Remove nullcontext from wsgi and asgi (#3983) #736

Job	Run time
Tasks (latest) (3.7, ubuntu-22.04)	2m 48s
Tasks (latest) (3.8, ubuntu-22.04)	4m 0s
Tasks (latest) (3.10, ubuntu-22.04)	3m 23s
Tasks (latest) (3.11, ubuntu-22.04)	3m 37s
Tasks (latest) (3.12, ubuntu-22.04)	5m 12s
Tasks (latest) (3.13, ubuntu-22.04)	5m 6s
Tasks (pinned) (3.7, ubuntu-22.04)	4m 3s
Tasks (pinned) (3.8, ubuntu-22.04)	4m 55s
Tasks (pinned) (3.9, ubuntu-22.04)	2m 9s
Tasks (pinned) (3.10, ubuntu-22.04)	4m 23s
Tasks (pinned) (3.11, ubuntu-22.04)	5m 30s
Tasks (pinned) (3.12, ubuntu-22.04)	4m 10s
All pinned Tasks tests passed	1s
	49m 17s

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