Add opt-in CodeTeams test helpers (#23) #129

Job	Run time
call-workflow-from-shared-config / Linter	33s
call-workflow-from-shared-config / Run tests: Ruby 3.4	42s
call-workflow-from-shared-config / Type Check	32s
call-workflow-from-shared-config / Run tests: Ruby 3.2	39s
call-workflow-from-shared-config / Run tests: Ruby 3.3	24s
call-workflow-from-shared-config / notify_on_failure	-1s
	2m 49s

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