Add tolerations for targetless agent. (#3033) #13995

Job	Run time
towncrier_check	9s
changed_files	10s
check_if_release_branch	1s
build mirrord CLI	0s
test_agent_image	6m 42s
lint	12m 55s
test_agent	3m 28s
check-rust-docs	4m 30s
integration_tests	15m 37s
lint_markdown	0s
test_cli_image	6m 46s
macos_tests	34m 50s
intellij_e2e_on_release_branch	0s
e2e (docker)	14m 17s
e2e (containerd)	13m 1s
vscode_e2e_on_release_branch	0s
ci	1s
	1h 52m 27s

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