Rust

Implement BLS12-381 `contracttype` support #4719

Job	Run time
fmt	10s
cargo-deny (advisories)	49s
readme	40s
build-and-test (latest, ubuntu-latest, x86_64-unknown-linux-gnu)	8m 56s
cargo-deny (bans licenses sources)	52s
build-and-test (msrv, windows-latest, x86_64-pc-windows-msvc)	15m 7s
migration-docs	13s
build-fuzz	43s
build-and-test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	8m 29s
build-and-test (latest, windows-latest, x86_64-pc-windows-msvc)	16m 11s
docs	2m 2s
build-and-test (msrv, ubuntu-latest, aarch64-unknown-linux-gnu, true)	2m 30s
check-git-rev-deps	8s
build-and-test (latest, ubuntu-latest, aarch64-unknown-linux-gnu, true)	2m 1s
semver-checks	5m 53s
publish-dry-run	0s
complete	2s
	1h 4m 46s

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