fix(openai-agents): Isolate agent run #3699

Job	Run time
Tasks (latest) (3.13, ubuntu-22.04)	3m 47s
Tasks (latest) (3.7, ubuntu-22.04)	2m 33s
Tasks (latest) (3.10, ubuntu-22.04)	2m 40s
Tasks (latest) (3.8, ubuntu-22.04)	2m 12s
Tasks (pinned) (3.8, ubuntu-22.04)	3m 33s
Tasks (latest) (3.12, ubuntu-22.04)	2m 55s
Tasks (pinned) (3.11, ubuntu-22.04)	4m 28s
Tasks (pinned) (3.6, ubuntu-22.04)	4m 12s
Tasks (pinned) (3.9, ubuntu-22.04)	3m 56s
Tasks (pinned) (3.12, ubuntu-22.04)	4m 55s
Tasks (latest) (3.11, ubuntu-22.04)	2m 49s
Tasks (pinned) (3.13, ubuntu-22.04)	5m 23s
Tasks (pinned) (3.10, ubuntu-22.04)	3m 42s
Tasks (pinned) (3.7, ubuntu-22.04)	4m 42s
All pinned Tasks tests passed	3s
	51m 50s

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