[A11y] Add labels to control inputs (#221639)

## Summary

Closes #183202.
Closes #220687.

This adds aria-labels to the number fields on the range slider control.

<img width="704" alt="Screenshot 2025-05-27 at 8 10 38 AM"
src="https://github.com/user-attachments/assets/ffeb1b98-6765-41ab-abd3-bff2ce176cda"
/>

<img width="413" alt="Screenshot 2025-05-27 at 8 04 59 AM"
src="https://github.com/user-attachments/assets/e899b1f9-6290-463f-9213-2e0a456fa677"
/>

This also adds an aria-label to the search filter at the top of the
options list popover.

<img width="2559" alt="Screenshot 2025-06-02 at 7 23 53 AM"
src="https://github.com/user-attachments/assets/47e870dc-55c2-40bd-b461-a16022691810"
/>

### Checklist

Check the PR satisfies following conditions. 

Reviewers should verify this PR satisfies this list as well.

- [ ] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/src/platform/packages/shared/kbn-i18n/README.md)
- [ ]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [ ] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [ ] If a plugin configuration key changed, check if it needs to be
allowlisted in the cloud and added to the [docker
list](https://github.com/elastic/kibana/blob/main/src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker)
- [ ] This was checked for breaking HTTP API changes, and any breaking
changes have been approved by the breaking-change committee. The
`release_note:breaking` label should be applied in these situations.
- [ ] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed
- [ ] The PR description includes the appropriate Release Notes section,
and the correct `release_note:*` label is applied per the
[guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

### Identify risks

Does this PR introduce any risks? For example, consider risks like hard
to test bugs, performance regression, potential of data loss.

Describe the risk, its severity, and mitigation for each identified
risk. Invite stakeholders and evaluate how to proceed before merging.

- [ ] [See some risk
examples](https://github.com/elastic/kibana/blob/main/RISK_MATRIX.mdx)
- [ ] ...

---------

Co-authored-by: Marta Bondyra <4283304+mbondyra@users.noreply.github.com>

src/platform/plugins/shared/controls/public/control_group/components/control_panel.tsx

@@ -98,6 +98,7 @@ export const ControlPanel = <ApiType extends DefaultControlApi = DefaultControlA
   const isEditable = viewMode === 'edit';
   const controlWidth = width ?? DEFAULT_CONTROL_WIDTH;
   const controlGrow = grow ?? DEFAULT_CONTROL_GROW;
+  const controlLabel = isTwoLine ? panelTitle || defaultPanelTitle || '...' : undefined;
   const hasRoundedBorders = !api?.CustomPrependComponent && !isEditable && isTwoLine;
   const shouldHideComponent = Boolean(blockingError);
 
@@ -135,7 +136,9 @@ export const ControlPanel = <ApiType extends DefaultControlApi = DefaultControlA
         <EuiFormRow
           data-test-subj="control-frame-title"
           fullWidth
-          label={isTwoLine ? panelTitle || defaultPanelTitle || '...' : undefined}
+          label={controlLabel}
+          id={`control-title-${uuid}`}
+          aria-label={`Control for ${controlLabel}`}
         >
           <EuiFormControlLayout
             fullWidth

src/platform/plugins/shared/controls/public/controls/data_controls/range_slider/components/range_slider_control.tsx

@@ -23,31 +23,33 @@ import { RangeSliderStrings } from '../range_slider_strings';
 import { rangeSliderControlStyles } from './range_slider.styles';
 
 interface Props {
-  fieldFormatter?: (value: string) => string;
+  compressed: boolean;
+  controlPanelClassName?: string;
   isInvalid: boolean;
   isLoading: boolean;
+  fieldName: string;
   max: number | undefined;
   min: number | undefined;
-  onChange: (value: RangeValue | undefined) => void;
   step: number;
-  value: RangeValue | undefined;
   uuid: string;
-  controlPanelClassName?: string;
-  compressed: boolean;
+  value: RangeValue | undefined;
+  fieldFormatter?: (value: string) => string;
+  onChange: (value: RangeValue | undefined) => void;
 }
 
 export const RangeSliderControl: FC<Props> = ({
-  fieldFormatter,
+  compressed,
+  controlPanelClassName,
   isInvalid,
   isLoading,
+  fieldName,
   max,
   min,
-  onChange,
   step,
-  value,
   uuid,
-  controlPanelClassName,
-  compressed,
+  value,
+  fieldFormatter,
+  onChange,
 }: Props) => {
   const rangeSliderRef = useRef<EuiDualRangeProps | null>(null);
 
@@ -141,10 +143,14 @@ export const RangeSliderControl: FC<Props> = ({
       inputValue,
       testSubj,
       placeholder,
+      ariaLabel,
+      id,
     }: {
       inputValue: string;
       testSubj: string;
       placeholder: string;
+      ariaLabel: string;
+      id: string;
     }) => {
       return {
         isInvalid: undefined, // disabling this prop to handle our own validation styling
@@ -155,9 +161,12 @@ export const RangeSliderControl: FC<Props> = ({
           isInvalid ? styles.fieldNumbers.invalid : styles.fieldNumbers.valid,
         ],
         className: 'rangeSliderAnchor__fieldNumber',
-        'data-test-subj': `rangeSlider__${testSubj}`,
         value: inputValue === placeholder ? '' : inputValue,
         title: !isInvalid && step ? '' : undefined, // overwrites native number input validation error when the value falls between two steps
+        'data-test-subj': `rangeSlider__${testSubj}`,
+        'aria-label': ariaLabel,
+        'aria-labelledby': `control-title-${id}`,
+        id: `controls-range-slider-${id}`,
       };
     },
     [isInvalid, step, styles]
@@ -168,16 +177,20 @@ export const RangeSliderControl: FC<Props> = ({
       inputValue: displayedValue[0],
       testSubj: 'lowerBoundFieldNumber',
       placeholder: String(min ?? -Infinity),
+      ariaLabel: RangeSliderStrings.control.getLowerBoundAriaLabel(fieldName),
+      id: uuid,
     });
-  }, [getCommonInputProps, min, displayedValue]);
+  }, [getCommonInputProps, displayedValue, min, fieldName, uuid]);
 
   const maxInputProps = useMemo(() => {
     return getCommonInputProps({
       inputValue: displayedValue[1],
       testSubj: 'upperBoundFieldNumber',
       placeholder: String(max ?? Infinity),
+      ariaLabel: RangeSliderStrings.control.getUpperBoundAriaLabel(fieldName),
+      id: uuid,
     });
-  }, [getCommonInputProps, max, displayedValue]);
+  }, [getCommonInputProps, displayedValue, max, fieldName, uuid]);
 
   return (
     <span

src/platform/plugins/shared/controls/public/controls/data_controls/range_slider/get_range_slider_control_factory.tsx

@@ -236,16 +236,25 @@ export const getRangesliderControlFactory = (): DataControlFactory<
       return {
         api,
         Component: ({ className: controlPanelClassName }) => {
-          const [dataLoading, fieldFormatter, max, min, selectionHasNoResults, step, value] =
-            useBatchedPublishingSubjects(
-              dataLoading$,
-              dataControlManager.api.fieldFormatter,
-              max$,
-              min$,
-              selectionHasNoResults$,
-              step$,
-              selections.value$
-            );
+          const [
+            dataLoading,
+            fieldFormatter,
+            max,
+            min,
+            selectionHasNoResults,
+            step,
+            value,
+            fieldName,
+          ] = useBatchedPublishingSubjects(
+            dataLoading$,
+            dataControlManager.api.fieldFormatter,
+            max$,
+            min$,
+            selectionHasNoResults$,
+            step$,
+            selections.value$,
+            dataControlManager.api.fieldName$
+          );
 
           useEffect(() => {
             return () => {
@@ -260,6 +269,7 @@ export const getRangesliderControlFactory = (): DataControlFactory<
           return (
             <RangeSliderControl
               controlPanelClassName={controlPanelClassName}
+              fieldName={fieldName}
               fieldFormatter={fieldFormatter}
               isInvalid={Boolean(value) && selectionHasNoResults}
               isLoading={typeof dataLoading === 'boolean' ? dataLoading : false}

src/platform/plugins/shared/controls/public/controls/data_controls/range_slider/range_slider_strings.ts

@@ -19,6 +19,16 @@ export const RangeSliderStrings = {
       i18n.translate('controls.rangeSlider.control.invalidSelectionWarningLabel', {
         defaultMessage: 'Selected range returns no results.',
       }),
+    getLowerBoundAriaLabel: (fieldName: string) =>
+      i18n.translate('controls.rangeSlider.control.lowerBoundAriaLabel', {
+        defaultMessage: 'Range slider lower bound for {fieldName}',
+        values: { fieldName },
+      }),
+    getUpperBoundAriaLabel: (fieldName: string) =>
+      i18n.translate('controls.rangeSlider.control.lowerBoundAriaLabel', {
+        defaultMessage: 'Range slider upper bound for {fieldName}',
+        values: { fieldName },
+      }),
   },
   editor: {
     getStepTitle: () =>