[pipeline] switch from broadcast channel to shared future #71302

Job	Run time
file_change_determinator	12s
rust-doc-tests	5m 22s
rust-unit-tests	0s
rust-consensus-only-smoke-test	0s
rust-consensus-only-unit-test	0s
rust-cargo-deny	1m 59s
rust-lints	3m 34s
rust-check-merge-base	1m 26s
general-lints	29s
rust-smoke-tests	29m 57s
rust-build-cached-packages	2m 1s
rust-targeted-unit-tests	13m 21s
rust-cryptohasher-domain-separation-check	0s
	58m 21s

Provide feedback