[Security Solution] [Attack discovery] Fixes overflow styling for markdown with XL badges (#213666)

### [Security Solution] [Attack discovery] Fixes overflow styling for markdown with XL badges

This PR fixes an overflow styling issue when markdown contains badges that exceed the width of the container, as reported in <https://github.com/elastic/kibana/issues/213228>.

It also hides the `Load query` and `Save query` menu items from the filter popup menu in the settings flyout.

![scrollable details](https://github.com/user-attachments/assets/bb895de2-cade-4f89-8dcd-643349eca115)

#### Details

- The overflow issue is fixed by enabling horizontal scrolling when badges exceed the width of the markdown container, as illustrated by the before and after screenshots below:

**Before**

![details before](https://github.com/user-attachments/assets/e6698b38-2899-4ded-84f1-ad0d00418245)

**After**

![details after](https://github.com/user-attachments/assets/35e387aa-659a-4b6e-b5a9-d2b0972c98b0)

- The`Load query` and `Save query` menu items in the filter popup menu are now hidden, as illustrated by the before and after screenshots of the settings flyout below:

**Before**

![filter menu before](https://github.com/user-attachments/assets/8e930247-3fec-4ff2-b4dc-0d49f7248b8f)

**After**

![filter menu after](https://github.com/user-attachments/assets/b874ff2c-8000-4f0f-a542-0366acbdcce2)

x-pack/solutions/security/plugins/security_solution/public/attack_discovery/pages/results/attack_discovery_panel/tabs/attack_discovery_tab/index.test.tsx

@@ -173,4 +173,24 @@ The user Administrator opened a malicious Microsoft Word document (C:\\Program F
       expect(detailsMarkdown.textContent).toEqual(expected);
     });
   });
+
+  describe('horizontal overflow for content', () => {
+    it.each([['summaryContent'], ['detailsContent']])(
+      'enables horizontal scrolling for the %s content',
+      (contentTestId) => {
+        render(
+          <TestProviders>
+            <AttackDiscoveryTab
+              attackDiscovery={mockAttackDiscovery}
+              replacements={mockReplacements}
+            />
+          </TestProviders>
+        );
+
+        const content = screen.getByTestId(contentTestId);
+
+        expect(content).toHaveStyle('overflow-x: auto');
+      }
+    );
+  });
 });

x-pack/solutions/security/plugins/security_solution/public/attack_discovery/pages/results/attack_discovery_panel/tabs/attack_discovery_tab/index.tsx

@@ -19,6 +19,11 @@ import { AttackDiscoveryMarkdownFormatter } from '../../../attack_discovery_mark
 import * as i18n from './translations';
 import { ViewInAiAssistant } from '../../view_in_ai_assistant';
 
+const scrollable: React.CSSProperties = {
+  overflowX: 'auto',
+  scrollbarWidth: 'thin',
+};
+
 interface Props {
   attackDiscovery: AttackDiscovery;
   replacements?: Replacements;
@@ -66,10 +71,12 @@ const AttackDiscoveryTabComponent: React.FC<Props> = ({
         <h2>{i18n.SUMMARY}</h2>
       </EuiTitle>
       <EuiSpacer size="s" />
+      <div style={scrollable} data-test-subj="summaryContent">
         <AttackDiscoveryMarkdownFormatter
           disableActions={showAnonymized}
           markdown={showAnonymized ? summaryMarkdown : summaryMarkdownWithReplacements}
         />
+      </div>
 
       <EuiSpacer />
 
@@ -77,10 +84,13 @@ const AttackDiscoveryTabComponent: React.FC<Props> = ({
         <h2>{i18n.DETAILS}</h2>
       </EuiTitle>
       <EuiSpacer size="s" />
+
+      <div style={scrollable} data-test-subj="detailsContent">
         <AttackDiscoveryMarkdownFormatter
           disableActions={showAnonymized}
           markdown={showAnonymized ? detailsMarkdown : detailsMarkdownWithReplacements}
         />
+      </div>
 
       <EuiSpacer />
 

x-pack/solutions/security/plugins/security_solution/public/attack_discovery/pages/settings_flyout/alert_selection/alert_selection_query/index.tsx

@@ -164,6 +164,7 @@ const AlertSelectionQueryComponent: React.FC<Props> = ({
           showDatePicker={false}
           showFilterBar={true}
           showQueryInput={true}
+          showSavedQueryControls={false}
           showSubmitButton={false}
           isLoading={isLoadingIndexPattern}
           onFiltersUpdated={onFiltersUpdated}