[Security Solution][Alert details] - bring back last alert status change to flyout

[PhilippeOberti]

Summary

Over a year ago, this PR added some information to the alert details flyout, to show when an alert's status (closed, open or aknowledged) had been modified last and by which user.
Shortly after, this follow up PR removed the UI from the alert details flyout, as the information wasn't extremely important and was taking some valuable vertical space, pushing down below the Highlighted fields section, that users were finding very important.

A few months later, we added the ability to persist which of the top sections (About, Investigation, Visualizations, Insights and Response) were collapsed or expanded. That way the user wouldn't have to always collapse or expand sections they would often don't need.

This PR brings back the alert's last status changes to the About section, as the vertical space is no longer a big issues, because users can now collapse the entire About section.

If data is not present, the last change UI is not shown

If the correct data is shown:

How to test

• have a few alerts in the alerts table
• open the alert details flyout for one alert and change the status (button in the header)
• verify that the last status change section is shown in the About section

Checklist

• 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

[elasticmachine]

Pinging @elastic/security-threat-hunting-investigations (Team:Threat Hunting:Investigations)

[elasticmachine]

💔 Build Failed

• Buildkite Build
• Commit: 1a99cc5

Failed CI Steps

• Jest Tests #5
• Investigations - Security Solution Cypress Tests #7
• Serverless Investigations - Security Solution Cypress Tests #2

Test Failures

• [job] [logs] Jest Tests #5 / AddInferenceFlyout valid submission

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
securitySolution	6508	6509	+1

Async chunks

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

id	before	after	diff
securitySolution	21.4MB	21.4MB	+3.8KB

History