[8.5](backport #1912) LoadLimits does not override existing values

[mergify]

This is an automatic backport of pull request #1912 done by Mergify.
Cherry-pick of 1b2834c has failed:

On branch mergify/bp/8.5/pr-1912
Your branch is up to date with 'origin/8.5'.

You are currently cherry-picking commit 1b2834c.
  (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:   internal/pkg/config/cache.go
	modified:   internal/pkg/config/config_test.go
	modified:   internal/pkg/config/limits.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   CHANGELOG.next.asciidoc

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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[elasticmachine]

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• Start Time: 2022-09-27T16:30:46.291+0000

• Duration: 15 min 6 sec

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Total	336

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[michel-laterman]

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[michel-laterman]

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