Rust

Use secp256k1 for validator keys. #12264

Job	Run time
remote-net-test	3m 15s
ethereum-tests	5m 26s
check-outdated-cli-md	2m 4s
benchmark-test	4m 9s
default-features-and-witty-integration-test	17m 10s
execution-wasmtime-test	1m 14s
storage-service-tests	4m 48s
web	4m 59s
wasm-application-test	10m 17s
lint-cargo-clippy	12m 29s
lint-cargo-fmt	27s
lint-cargo-machete	27s
lint-cargo-sort	25s
lint-check-copyright-headers	16s
lint-check-for-outdated-readme	38s
lint-unexpected-chain-load-operations	2s
lint-wasm-applications	3m 41s
lint-cargo-doc	4m 24s
lint-check-all-features	16m 30s
lint-check-linera-service-graphql-schema	1m 24s
	1h 34m 5s

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