[8.18] fix: [Analytics:MachineLearning:AnomalyDetection:Jobs page] Edit model snapshot flyout missing title from announcement (elastic#217831) (elastic#218273)

# Backport

This will backport the following commits from `main` to `8.18`:
- [fix: [Analytics:MachineLearning:AnomalyDetection:Jobs page] Edit
model snapshot flyout missing title from announcement
(elastic#217831)](elastic#217831)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT [{"author":{"name":"Alexey
Antonov","email":"[email protected]"},"sourceCommit":{"committedDate":"2025-04-15T13:38:48Z","message":"fix:
[Analytics:MachineLearning:AnomalyDetection:Jobs page] Edit model
snapshot flyout missing title from announcement (elastic#217831)\n\nCloses:
elastic#216147\n\n**Description**\nDialog modal, flyout, field visible title
should be announced for the\nusers, especially using assistive
technology to know what dialog modal,\nflyout opened, what field is
active and what is needed to enter in it.\n\n**Changes made:**\n\n1.
Added` aria-labelledby={flyoutTitleId} `for mentioned
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[Analytics:MachineLearning:AnomalyDetection:Jobs page] Edit model
snapshot flyout missing title from
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[Analytics:MachineLearning:AnomalyDetection:Jobs page] Edit model
snapshot flyout missing title from announcement (elastic#217831)\n\nCloses:
elastic#216147\n\n**Description**\nDialog modal, flyout, field visible title
should be announced for the\nusers, especially using assistive
technology to know what dialog modal,\nflyout opened, what field is
active and what is needed to enter in it.\n\n**Changes made:**\n\n1.
Added` aria-labelledby={flyoutTitleId} `for mentioned
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[Analytics:MachineLearning:AnomalyDetection:Jobs page] Edit model
snapshot flyout missing title from announcement (elastic#217831)\n\nCloses:
elastic#216147\n\n**Description**\nDialog modal, flyout, field visible title
should be announced for the\nusers, especially using assistive
technology to know what dialog modal,\nflyout opened, what field is
active and what is needed to enter in it.\n\n**Changes made:**\n\n1.
Added` aria-labelledby={flyoutTitleId} `for mentioned
places","sha":"d47e77627ac594883969066205a0888bb5034efb"}}]}]
BACKPORT-->

Co-authored-by: Alexey Antonov <[email protected]>

Author: kibanamachine

x-pack/platform/plugins/shared/ml/public/application/components/model_snapshots/edit_model_snapshot_flyout/edit_model_snapshot_flyout.tsx

@@ -24,6 +24,7 @@ import {
   EuiSwitch,
   EuiConfirmModal,
   EuiCallOut,
+  useGeneratedHtmlId,
 } from '@elastic/eui';
 
 import type {
@@ -98,13 +99,22 @@ export const EditModelSnapshotFlyout: FC<Props> = ({ snapshot, job, closeFlyout
     setDeleteModalVisible(false);
   }
 
+  const flyoutTitleId = useGeneratedHtmlId({
+    prefix: 'editModelSnapshotFlyout',
+  });
+
   return (
     <>
-      <EuiFlyout onClose={closeWithoutReload} hideCloseButton size="m">
+      <EuiFlyout
+        onClose={closeWithoutReload}
+        hideCloseButton
+        size="m"
+        aria-labelledby={flyoutTitleId}
+      >
         <EuiFlyoutBody>
           <EuiFlexItem>
             <EuiTitle size="s">
-              <h5>
+              <h5 id={flyoutTitleId}>
                 <FormattedMessage
                   id="xpack.ml.editModelSnapshotFlyout.title"
                   defaultMessage="Edit snapshot {ssId}"