[omdb] Add `omdb instance info` command #37970

Job	Run time
check-features	10m 16s
build-docs	8m 20s
check-omicron-deployment (ubuntu-22.04)	8m 50s
check-omicron-deployment (macos-14)	8m 13s
check-style	18s
clippy-lint	9m 57s
	45m 54s

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