Rust

[nexus] mark schema tests as heavy, increase timeout for one of them #26593

Job	Run time
build-docs	10m 30s
check-omicron-deployment (ubuntu-22.04)	10m 1s
check-omicron-deployment (macos-12)	14m 34s
check-style	16s
clippy-lint	12m 35s
	47m 56s

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