ctutils: deprecate `Choice::new` (#1312) #126

Job	Run time
build (1.85.0, thumbv7em-none-eabi)	13s
test-careful	56s
test (stable)	15s
build (1.85.0, wasm32-unknown-unknown)	17s
test-miri (s390x-unknown-linux-gnu)	59s
build (stable, thumbv7em-none-eabi)	11s
build (stable, wasm32-unknown-unknown)	14s
test-miri (x86_64-unknown-linux-gnu)	45s
test (1.85.0)	16s
minimal-versions / minimal-versions	29s
	4m 35s

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