[RAM] Add the "updated at" feature in new alerts table

[jcger]

Summary

This PR implements the updated at feature addressed in #125561 to the new Alerts Table

Checklist

Delete any items that are not applicable to this PR.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Unit or functional tests were updated or added to match the most common scenarios
• This renders correctly on smaller devices using a responsive layout. (You can test this in your browser)

[elasticmachine]

Pinging @elastic/response-ops (Team:ResponseOps)

[jcger]

@elasticmachine merge upstream

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 99f84c7
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Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
triggersActionsUi	560	562	+2

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
triggersActionsUi	399	400	+1

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
triggersActionsUi	920.4KB	921.6KB	+1.2KB

Unknown metric groups

API count

id	before	after	diff
triggersActionsUi	420	421	+1

ESLint disabled line counts

id	before	after	diff
triggersActionsUi	182	183	+1

Total ESLint disabled count

id	before	after	diff
triggersActionsUi	186	187	+1

History

• 💚 Build #59906 succeeded 82139dc
• 💔 Build #59871 failed 4a30862

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream