[SecuritySolution] Fix for an unxpected empty state in Insights

[janmonschke]

Summary

#142576 describes a bug where the "related alerts by process ancestry" insights - module is showing an empty state and it seems stuck:

The underlying issue for this behaviour was that the component did not handle all API responses correctly. In case of an undefined response for alertIds, the component would return null instead of an error/empty state message.

Checklist

• Unit or functional tests were updated or added to match the most common scenarios

[michaelolo24]

Thanks! LGTM

[janmonschke]

@elasticmachine merge upstream

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 212d252

Failed CI Steps

• FTR Configs #42

Test Failures

• [job] [logs] FTR Configs #42 / Reporting Functional Tests with forced timeout adds a visual warning in the report output

Metrics [docs]

Async chunks

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

id	before	after	diff
securitySolution	6.6MB	6.6MB	+25.0B

History

• 💔 Build #77918 failed e4cdf09
• 💚 Build #77873 succeeded 1ff889d

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

cc @janmonschke

[kibanamachine]

💚 All backports created successfully

Status	Branch	Result
✅	8.5

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