Merge branch 'sv-remove-reliable-docs' into 'master'

Remove reliable concept from docs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/148708



Merged-by: Tiffany Rea <trea@gitlab.com>
Approved-by: Valerie Burton <vburton@gitlab.com>
Approved-by: Tiffany Rea <trea@gitlab.com>
Reviewed-by: Valerie Burton <vburton@gitlab.com>
Co-authored-by: Sofia Vistas <svistas@gitlab.com>