Rust

uefi: Improve the VariableKey type and iterator #5696

Job	Run time
Integration Test (AArch64)	1m 10s
Integration Test (x86_64 Windows)	3m 26s
Build (stable MSRV)	23s
Build (feature permutations)	3m 12s
Build Standard Binary (nightly)	25s
Lints	1m 2s
Unit + Doc Tests (Miri)	1m 4s
Nightly (build, test, doc)	2m 37s
Unit + Doc Tests	1m 32s
Integration Test (IA-32)	2m 8s
Integration Test (x86_64)	1m 9s
	18m 8s

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