Adds prometheus export point to the agent pod. #13930

Job	Run time
towncrier_check	7s
changed_files	11s
check_if_release_branch	1s
build mirrord CLI	0s
lint	12m 15s
check-rust-docs	4m 17s
integration_tests	14m 20s
macos_tests	44m 9s
test_agent	3m 26s
test_cli_image	15m 31s
test_agent_image	6m 39s
lint_markdown	0s
e2e (docker)	12m 51s
e2e (containerd)	12m 21s
vscode_e2e_on_release_branch	0s
intellij_e2e_on_release_branch	0s
ci	1s
	2h 6m 9s

Provide feedback