Add policy for file ops. #13784

Job	Run time
check_if_release_branch	1s
towncrier_check	6s
changed_files	11s
build mirrord CLI	0s
test_agent	3m 11s
check-rust-docs	1m 0s
lint	3m 18s
integration_tests	12m 54s
test_agent_image	22s
macos_tests	32m 48s
test_cli_image	15m 34s
lint_markdown	0s
intellij_e2e_on_release_branch	0s
vscode_e2e_on_release_branch	0s
e2e (docker)	12m 19s
e2e (containerd)	11m 21s
ci	1s
	1h 33m 6s

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