Clean up yaml lint warnings
What does this MR do and why?
Over time minor yamllint warnings slowly build up in our various yaml files. Mostly pipeline config, CI/CD templates, and deprecation/removal yaml files. It's almost all related to #
comment spacing or indentation. It's not problematic, but where there is an actual error, it can be hard to scan through all the warnings to find the real error. For example: https://gitlab.com/gitlab-org/gitlab/-/jobs/4258144440
This MR just cleans up all the warnings, which I do every 4-6 months or so.
Here is the lint-yaml
job for this MR, post-cleanup: https://gitlab.com/gitlab-org/gitlab/-/jobs/4259303566
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