Merge branch '2635-use-version-files' into 'main'

Fetch versions from local files for Gitaly, GitLab Shell, and Workhorse

Closes #2635

See merge request !4837



Merged-by: Kev Kloss <kkloss@gitlab.com>
Approved-by: Kev Kloss <kkloss@gitlab.com>
Reviewed-by: Nao Hashizume <nhashizume@gitlab.com>
Reviewed-by: Kev Kloss <kkloss@gitlab.com>
Co-authored-by: Nao Hashizume <nhashizume@gitlab.com>