Lint

Add response_delay_seconds to Flask mock #7200

Job	Run time
build (3.13, windows-latest, manual)	1m 35s
build (3.13, ubuntu-latest, manual)	1m 20s
build (3.13, windows-latest, pre-commit)	1m 35s
build (3.13, windows-latest, pre-push)	4m 12s
build (3.13, ubuntu-latest, pre-push)	3m 26s
build (3.13, ubuntu-latest, pre-commit)	1m 14s
completion-lint	3s
	13m 25s

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