Rust

make rack_topology required to save me from myself #22511

Job	Run time
build-docs	20m 21s
check-omicron-deployment (ubuntu-22.04)	12m 1s
check-omicron-deployment (macos-12)	12m 39s
clippy-lint	27m 3s
check-style	20s
	1h 12m 24s

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