Bump to `signature` 3 #2573

Job	Run time
build (1.85.0, wasm32-unknown-unknown)	1m 44s
build (1.85.0, thumbv7em-none-eabi)	1m 41s
build (stable, thumbv7em-none-eabi)	1m 43s
build (stable, wasm32-unknown-unknown)	1m 42s
fuzz	2m 12s
test (1.85.0)	7m 33s
test (stable)	7m 22s
minimal-versions	0s
	23m 57s

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