ruby: Improve Ruby test and debug task configurations (#36691)

Hi! This pull request adds missing `cwd` field to all Ruby test tasks
otherwise `rdbg` will be broken when the user tries to debug a test.
Thanks!

Release Notes:

- N/A
81cb24810bVitaly Slobodin committed on 8/21/2025, 5:23:41 PM· committed by GitHubparentf2899bf
1 file changedLine totals unavailable