Serve some basic config info at /info. #66744

Job	Run time
rust-consensus-only-unit-test	0s
rust-consensus-only-smoke-test	0s
file_change_determinator	10s
rust-doc-tests	4m 58s
rust-unit-tests	0s
rust-cargo-deny	1m 38s
rust-lints	2m 46s
general-lints	26s
rust-smoke-tests	6m 47s
rust-build-cached-packages	2m 5s
rust-check-merge-base	1m 10s
rust-cryptohasher-domain-separation-check	0s
rust-targeted-unit-tests	6m 45s
	26m 45s

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