Lint

Add response_delay_seconds to Flask mock #7199

Job	Run time
build (3.13, ubuntu-latest, manual)	1m 15s
build (3.13, ubuntu-latest, pre-commit)	1m 11s
build (3.13, windows-latest, pre-push)	4m 50s
build (3.13, windows-latest, pre-commit)	1m 39s
build (3.13, windows-latest, manual)	1m 37s
build (3.13, ubuntu-latest, pre-push)	3m 34s
completion-lint	4s
	14m 10s

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