Rust

Simplify contract event testing #5782

Job	Run time
check-git-rev-deps	9s
setup	4s
build-fuzz	1m 27s
semver-checks	6m 15s
fmt	10s
expand-test-wasms	3m 22s
cargo-deny (bans licenses sources)	39s
cargo-deny (advisories)	50s
readme	1m 16s
migration-docs	8s
docs	3m 22s
publish-dry-run	0s
build (latest, ubuntu-latest, x86_64-unknown-linux-gnu)	4m 27s
build (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	4m 59s
test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	7m 34s
test (latest, ubuntu-latest, x86_64-unknown-linux-gnu)	6m 22s
complete	3s
	41m 7s

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