Rust

Add FromRaw impl for some curve points #384

Job	Run time
build-wasm	52s
check-all	8s
check	14s
build-wasm-nostd	27s
check-alloc	5s
check-changelog	3s
check-doc	15s
check-semver (generic-ec, all-features)	30s
check-nostd	9s
check-semver (generic-ec, only-explicit-features)	21s
clippy	13s
check-semver (generic-ec-core, all-features)	20s
check-semver (generic-ec-core, only-explicit-features)	16s
clippy-nostd	17s
fmt	11s
check-semver (generic-ec-curves, all-features)	26s
clippy-tests	11s
check-semver (generic-ec-curves, only-explicit-features)	17s
check-semver (generic-ec-zkp, all-features)	29s
test	37s
check-semver (generic-ec-zkp, only-explicit-features)	20s
	6m 41s

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