Clarify when disabling Gitaly makes sense
What does this MR do?
Make it clearer that Gitaly is not something you can turn off. The option to turn it off in Omnibus only exists for GitLab cluster configurations where Gitaly runs on some but not all machines in the cluster.
Are there points in the code the reviewer needs to double check?
Why was this MR needed?
Screenshots (if relevant)
Does this MR meet the acceptance criteria?
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Changelog entry added, if necessary -
Documentation created/updated -
API support added -
Tests added for this feature/bug - Review
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Has been reviewed by UX -
Has been reviewed by Frontend -
Has been reviewed by Backend -
Has been reviewed by Database
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Conform by the merge request performance guides -
Conform by the style guides -
Squashed related commits together -
Internationalization required/considered -
End-to-end tests pass ( package-qa
manual pipeline job)