Adds prometheus export point to the agent pod. #13555

Job	Run time
towncrier_check	11s
changed_files	11s
check_if_release_branch	1s
build mirrord CLI	0s
lint	1m 6s
check-rust-docs	1m 8s
lint_markdown	0s
integration_tests	1m 18s
macos_tests	1m 5s
test_agent_image	1m 11s
test_agent	1m 6s
test_cli_image	1m 19s
e2e	1s
intellij_e2e_on_release_branch	1s
vscode_e2e_on_release_branch	1s
ci	1s
	8m 40s

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