[8.8](backport #35647) libbeat/monitoring/inputmon: log key, id and input type when registering/deregistering metrics

[mergify]

This is an automatic backport of pull request #35647 done by Mergify.
Cherry-pick of 8abdf32 has failed:

On branch mergify/bp/8.8/pr-35647
Your branch is up to date with 'origin/8.8'.

You are currently cherry-picking commit 8abdf326f8.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   CHANGELOG-developer.next.asciidoc

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   libbeat/monitoring/inputmon/input.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[botelastic]

This pull request doesn't have a Team:<team> label.

[mergify]

This pull request has not been merged yet. Could you please review and merge it @efd6? 🙏

[elasticmachine]

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• Start Time: 2023-06-05T07:07:02.897+0000

• Duration: 73 min 6 sec

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Test	Results
Failed	0
Passed	26361
Skipped	1975
Total	28336

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