Rust

Fix lints/tests on nightly and unpin the CI nightly version #7109

Job	Run time
Integration Test (x86_64)	1m 25s
Integration Test (AArch64)	1m 26s
Integration Test (x86_64 Windows)	1m 54s
Unit + Doc Tests	42s
Integration Test (IA-32)	1m 36s
Build (uefi-raw MSRV)	30s
Build (feature permutations)	2m 15s
Unit + Doc Tests (Miri)	1m 15s
Nightly (build, test, doc)	1m 33s
Build Standard Binary (nightly)	29s
Test Coverage	46s
Build (stable MSRV)	31s
	14m 22s

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