Add policy for file ops. #13785

Job	Run time
towncrier_check	11s
changed_files	7s
check_if_release_branch	1s
build mirrord CLI	0s
check-rust-docs	1m 8s
integration_tests	9m 34s
lint	3m 32s
lint_markdown	0s
test_agent	3m 28s
macos_tests	9m 33s
test_agent_image	6m 8s
test_cli_image	6m 31s
e2e (docker)	3m 17s
vscode_e2e_on_release_branch	0s
e2e (containerd)	3m 13s
intellij_e2e_on_release_branch	0s
ci	1s
	46m 44s

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