Reload the collector sub-process instead of restarting it

[swiatekm]

What does this PR do?

Why is it important?

Checklist

• I have read and understood the pull request guidelines of this project.
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in ./changelog/fragments using the changelog tool
• I have added an integration test or an E2E test

Disruptive User Impact

How to test this PR locally

Related issues

Questions to ask yourself

• How are we going to support this in production?
• How are we going to measure its adoption?
• How are we going to debug this?
• What are the metrics I should take care of?
• ...

[mergify]

This pull request does not have a backport label. Could you fix it @swiatekm? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-./d./d is the label that automatically backports to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b feat/stop-collector-restarts upstream/feat/stop-collector-restarts
git merge upstream/main
git push upstream feat/stop-collector-restarts

[elasticmachine]

💔 Build Failed

• Buildkite Build
• Commit: 7f2109d

Failed CI Steps

• check-ci
• Win2022:sudo:default
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• x86_64:non-sudo: default
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• x86_64:sudo: fleet-privileged
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• arm:sudo: default
• arm:sudo: default
• x86_64:non-sudo: default - platform-ingest-elastic-agent-debian-11-1769907687
• x86_64:non-sudo: default - platform-ingest-elastic-agent-debian-11-1769907687
• x86_64:non-sudo: default - platform-ingest-elastic-agent-debian-13-1769907687
• x86_64:non-sudo: default - platform-ingest-elastic-agent-debian-13-1769907687
• x86_64:sudo: default - platform-ingest-elastic-agent-debian-11-1769907687
• x86_64:sudo: default - platform-ingest-elastic-agent-debian-11-1769907687
• x86_64:sudo: fleet-privileged - platform-ingest-elastic-agent-debian-11-1769907687
• x86_64:sudo: fleet-privileged - platform-ingest-elastic-agent-debian-11-1769907687
• x86_64:sudo: fleet-privileged - platform-ingest-elastic-agent-debian-13-1769907687
• x86_64:sudo: fleet-privileged - platform-ingest-elastic-agent-debian-13-1769907687

History

• 💔 Build #34818 failed 61b13e6
• 💔 Build #34790 failed 273f07e
• 💔 Build #34781 failed c0d9643

cc @swiatekm