[8.x](backport #41207) [Auditbeat] Use a separate netlink socket for control to avoid data congestion.

[mergify]

Proposed commit message

Use a separate socket for GetStatus.

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

How to test this PR locally

Run this program while starting Auditbeat. In a separate terminal run while true; do ss -f netlink | grep auditbeat; done

You will see the auditbeat netlink sockets disappear but Auditbeat will continue to run.
Data will stop flowing to Elasticsearch, and an error message will be pushed Elasticsearch, which will be similar to this:

With this PR's patch, the netlink sockets will remain, data will flow to Elasticsearch, and no error message will be pushed.

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This is an automatic backport of pull request #41207 done by [Mergify](https://mergify.com).

[botelastic]

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