[meta] Changelog Automation

[ArthurSens]

Thanks to @SachinSahu431, we advanced a lot in our project of changelog automation :)

We can't say it's complete though, since we haven't battle-tested the automation with a real release, and we also found a few things we'd like to clean up.

This issue is a meta issue, collecting all things we still want to do before declaring that "Changelog automation is completed".

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• Do not block Changelog CI if the PR's author is a known bot. #1547
• Do not comment on PR if the description is ok.
• Skip label removal/readd if PR description changed by type didn't #1548
• Go through all PR's merged since last release and add appropriate label
• Review and merge Changelog generation workflow #1519
• Test automation in test branch

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In a very far future, we'd like to move this work to promu. Ideally continuing the work done in prometheus/promu#170

[bwplotka]

Don't think it's completed

Did you mean to close as not planned @ArthurSens ?