Fix fs policy test. (#3010) #13796

Job	Run time
changed_files	11s
check_if_release_branch	1s
towncrier_check	11s
build mirrord CLI	0s
lint	4m 10s
check-rust-docs	1m 18s
macos_tests	23m 2s
integration_tests	13m 13s
test_agent	3m 10s
test_agent_image	6m 18s
test_cli_image	10m 31s
lint_markdown	0s
e2e (docker)	13m 31s
e2e (containerd)	14m 23s
intellij_e2e_on_release_branch	0s
vscode_e2e_on_release_branch	0s
ci	1s
	1h 30m 0s

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