Add opt-in CodeTeams test helpers #118

Job	Run time
call-workflow-from-shared-config / Linter	8s
call-workflow-from-shared-config / Run tests: Ruby 3.3	15s
call-workflow-from-shared-config / Run tests: Ruby 3.4	14s
call-workflow-from-shared-config / Run tests: Ruby 3.2	15s
call-workflow-from-shared-config / Type Check	10s
call-workflow-from-shared-config / notify_on_failure	0s
	1m 2s

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