k256

k256: refactored `lincomb` to use `LinearCombinationExt` trait (#974) #2051

Job	Run time
cross (armv7-unknown-linux-gnueabihf, 1.65.0)	5m 4s
cross (armv7-unknown-linux-gnueabihf, stable)	1m 31s
cross (aarch64-unknown-linux-gnu, 1.65.0)	4m 54s
cross (aarch64-unknown-linux-gnu, stable)	1m 29s
benches (1.65.0)	4m 53s
cross (powerpc-unknown-linux-gnu, 1.65.0)	4m 51s
benches (stable)	1m 15s
build (1.65.0, thumbv7em-none-eabi)	4m 6s
cross (powerpc-unknown-linux-gnu, stable)	1m 31s
doc	25s
build (1.65.0, wasm32-unknown-unknown)	4m 34s
build (stable, thumbv7em-none-eabi)	46s
test (i686-unknown-linux-gnu, 1.65.0, sudo apt update && sudo apt install gcc-multilib)	5m 33s
build (stable, wasm32-unknown-unknown)	37s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 51s
test (x86_64-unknown-linux-gnu, 1.65.0)	5m 1s
test (x86_64-unknown-linux-gnu, stable)	1m 23s
	49m 44s

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