k256

Upgrade all crates to the 2024 edition and bump MSRV to 1.85 #2282

Job	Run time
benches (1.85.0)	1m 18s
benches (stable)	1m 15s
build (1.85.0, thumbv7em-none-eabi)	1m 15s
build (1.85.0, wasm32-unknown-unknown)	1m 12s
cross (armv7-unknown-linux-gnueabihf, 1.85.0)	1m 23s
doc	52s
build (stable, thumbv7em-none-eabi)	1m 12s
cross (armv7-unknown-linux-gnueabihf, stable)	1m 34s
build (stable, wasm32-unknown-unknown)	1m 2s
cross (aarch64-unknown-linux-gnu, 1.85.0)	1m 27s
test (i686-unknown-linux-gnu, 1.85.0, sudo apt update && sudo apt install gcc-multilib)	1m 54s
cross (aarch64-unknown-linux-gnu, stable)	1m 31s
cross (powerpc-unknown-linux-gnu, 1.85.0)	1m 27s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 59s
cross (powerpc-unknown-linux-gnu, stable)	1m 19s
test (x86_64-unknown-linux-gnu, 1.85.0)	1m 41s
test (x86_64-unknown-linux-gnu, stable)	1m 46s
	24m 7s

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