Add tolerations for targetless agent. #13991

Job	Run time
towncrier_check	7s
changed_files	7s
check_if_release_branch	1s
build mirrord CLI	0s
lint	12m 14s
integration_tests	11m 5s
check-rust-docs	4m 33s
lint_markdown	0s
macos_tests	24m 7s
test_agent	3m 26s
test_agent_image	6m 39s
test_cli_image	7m 0s
e2e (docker)	15m 29s
intellij_e2e_on_release_branch	0s
e2e (containerd)	15m 13s
vscode_e2e_on_release_branch	0s
ci	1s
	1h 40m 2s

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