[RAC] Verify sorting, filtering, adding/removing fields all work

[mgiota]

📝 Summary

In the Observability alerts table we should make sure that following work fine:

• sorting
• filtering
• adding fields
• removing fields
• resizing columns
• selecting header columns

✔️ Acceptance criteria

• above mentioned items should be checked
• if needed respective tickets should be created and added to this ticket

Issues found while testing:

• [Observability RAC]: Search a term in the reason field doesn't seem to work #108177
• [Observability RAC] Actions Header selection looks broken #108153
• [Observability RAC] Reason field appears multiple times in the fields popup #108169

Low priority added to Backlog

• [Observability RAC] Add tooltips to the Observability Alerts table headings #108173
• [Observability RAC] Resize cell columns while resizing the header #108159
• [Observability] Change the search placeholder text to something more meaninigful #108179

[elasticmachine]

Pinging @elastic/logs-metrics-ui (Team:logs-metrics-ui)

[formgeist]

Added #108179 to the list (low priority)

[mgiota]

@formgeist Awesome! I had something similar in mind while doing this one #107366. It looks like a quick fix