[fastpath] send certified transactions to fast path #78531

Job	Run time
diff	8s
license-check	1m 7s
test (ubuntu-ghcloud)	28m 1s
test-extra (ubuntu-ghcloud)	26m 22s
cargo-deny (bans, licenses, sources)	37s
cargo-deny (advisories)	35s
clippy	3m 41s
move-test	0s
rustfmt	22s
simtest	15m 39s
test-extra	0s
test	0s
windows-build (windows-ghcloud)	9m 7s
cutting a new execution layer	1m 31s
	1h 27m 10s

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