Docs edits to clarify feature flags motivations and usage in Runner
What does this MR do?
Clarify feature flags motivations and usage in Runner. Also added a link to more specific feature flags doc to improve docs UX and provide a more complete overview of the feature.
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/66805
Moving docs to a new location?
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Make sure the old link is not removed and has its contents replaced with a link to the new location. -
Make sure internal links pointing to the document in question are not broken. -
Search and replace any links referring to old docs in GitLab Runner's source code
Edited by 🤖 GitLab Bot 🤖