Merge branch 'sarahgerman-redirect-test-new-loc' into 'master'

Add handling for docs navigation file move

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183258



Merged-by: Jan Provaznik <jprovaznik@gitlab.com>
Approved-by: Achilleas Pipinellis <axil@gitlab.com>
Approved-by: Jan Provaznik <jprovaznik@gitlab.com>
Co-authored-by: Sarah German <sgerman@gitlab.com>