ctutils: `Choice::from_u128*` constructors (#1285) #83

Job	Run time
test-miri (s390x-unknown-linux-gnu)	55s
test-miri (x86_64-unknown-linux-gnu)	45s
test (stable)	18s
test (1.85.0)	16s
test-careful	53s
build (stable, wasm32-unknown-unknown)	14s
build (1.85.0, wasm32-unknown-unknown)	17s
minimal-versions / minimal-versions	29s
build (stable, thumbv7em-none-eabi)	10s
build (1.85.0, thumbv7em-none-eabi)	16s
	4m 33s

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