[SIEM] Update ML incompatible jobs callout text (#49668) (#49674)

## Summary

Updates the placeholder text within the ML Anomaly Detection UI for when certain jobs are incompatible. To test, remove all `siem:defaultIndex` patterns -- this will not send any indices to the recognize API, and all jobs will be _incompatible_.

Resolves https://github.com/elastic/kibana/issues/49200

![image](https://user-images.githubusercontent.com/2946766/67798171-a4252d80-fa48-11e9-83a6-643302935ae5.png)


### Checklist

Use ~~strikethroughs~~ to remove checklist items you don't feel are applicable to this PR.

- [ ] ~This was checked for cross-browser compatibility, [including a check against IE11](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#cross-browser-compatibility)~
- [x] 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/master/packages/kbn-i18n/README.md)
- [ ] ~[Documentation](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#writing-documentation) was added for features that require explanation or tutorials~
- [ ] ~[Unit or functional tests](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#cross-browser-compatibility) were updated or added to match the most common scenarios~
- [ ] ~This was checked for [keyboard-only and screenreader accessibility](https://developer.mozilla.org/en-US/docs/Learn/Tools_and_testing/Cross_browser_testing/Accessibility#Accessibility_testing_checklist)~

### For maintainers

- [ ] ~This was checked for breaking API changes and was [labeled appropriately](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#release-notes-process)~
- [ ] ~This includes a feature addition or change that requires a release note and was [labeled appropriately](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#release-notes-process)~

x-pack/legacy/plugins/siem/public/components/ml_popover/ml_popover.tsx

@@ -8,6 +8,8 @@ import { EuiButton, EuiCallOut, EuiPopover, EuiPopoverTitle, EuiSpacer } from '@
 import React, { useContext, useReducer, useState } from 'react';
 import styled from 'styled-components';
 import moment from 'moment';
+import { FormattedMessage } from '@kbn/i18n/react';
+import { DOC_LINK_VERSION, ELASTIC_WEBSITE_URL } from 'ui/documentation_links';
 import * as i18n from './translations';
 import { JobsFilters, JobSummary, SiemJob } from './types';
 import { hasMlAdminPermissions } from '../ml/permissions/has_ml_admin_permissions';
@@ -216,7 +218,23 @@ export const MlPopover = React.memo(() => {
                 iconType="alert"
                 size="s"
               >
-                <p>{i18n.MODULE_NOT_COMPATIBLE_DESCRIPTION}</p>
+                <p>
+                  <FormattedMessage
+                    defaultMessage="We could not find any data, see {mlDocs} for more information on Machine Learning job requirements."
+                    id="xpack.siem.components.mlPopup.moduleNotCompatibleDescription"
+                    values={{
+                      mlDocs: (
+                        <a
+                          href={`${ELASTIC_WEBSITE_URL}guide/en/siem/guide/${DOC_LINK_VERSION}/machine-learning.html`}
+                          rel="noopener noreferrer"
+                          target="_blank"
+                        >
+                          {'Anomaly Detection with Machine Learning'}
+                        </a>
+                      ),
+                    }}
+                  />
+                </p>
               </EuiCallOut>
 
               <EuiSpacer size="m" />

x-pack/legacy/plugins/siem/public/components/ml_popover/translations.ts

@@ -39,14 +39,6 @@ export const MODULE_NOT_COMPATIBLE_TITLE = (incompatibleJobCount: number) =>
       '{incompatibleJobCount} {incompatibleJobCount, plural, =1 {job} other {jobs}} are currently unavailable',
   });
 
-export const MODULE_NOT_COMPATIBLE_DESCRIPTION = i18n.translate(
-  'xpack.siem.components.mlPopup.moduleNotCompatibleDescription',
-  {
-    defaultMessage:
-      'You may be missing the required index patterns. Learn more in our documentation.',
-  }
-);
-
 export const START_JOB_FAILURE = i18n.translate(
   'xpack.siem.components.mlPopup.errors.startJobFailureTitle',
   {