Rust

uefi: Improve the VariableKey type and iterator #5695

Job	Run time
Lints	35s
Build Standard Binary (nightly)	28s
Build (feature permutations)	2m 53s
Build (stable MSRV)	29s
Unit + Doc Tests (Miri)	1m 6s
Nightly (build, test, doc)	1m 17s
Unit + Doc Tests	1m 45s
Integration Test (AArch64)	1m 14s
Integration Test (IA-32)	1m 11s
Integration Test (x86_64)	1m 12s
Integration Test (x86_64 Windows)	2m 38s
	14m 48s

Provide feedback