Adds prometheus export point to the agent pod. #13553

Job	Run time
towncrier_check	10s
check_if_release_branch	4s
changed_files	6s
build mirrord CLI	0s
integration_tests	9m 42s
check-rust-docs	1m 48s
lint	1m 56s
lint_markdown	0s
test_agent	3m 26s
macos_tests	22m 52s
test_agent_image	5m 59s
test_cli_image	16m 56s
e2e (docker)	13m 13s
e2e (containerd)	14m 12s
vscode_e2e_on_release_branch	0s
intellij_e2e_on_release_branch	0s
ci	1s
	1h 30m 25s

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