Revert "Merge branch 'auto-suffix-source-ref' into 'master'"

What does this MR do and why?

This reverts !1477 (merged).

The path detection doesn't seem to work well inside the container, see gitlab-org/gitlab!91779 (comment 1016197811).

Expected impact & dry-runs

These are strongly recommended to assist reviewers and reduce the time to merge your change.

See https://gitlab.com/gitlab-org/quality/triage-ops/-/tree/master/doc/scheduled#testing-with-a-dry-run on how to perform dry-runs.

Action items

• (If applicable) Add documentation to the handbook pages for Triage Operations =>
• (If applicable) Identify the affected groups and how to communicate to them:
  • /cc @person_or_group =>
  • Relevant Slack channels =>
  • Engineering week-in-review