[Splicing] Tx negotiation during splicing #18810

Job	Run time
coverage	3m 50s
ext-test	3m 50s
build (ubuntu-latest, stable)	3m 50s
build-tx-sync (ubuntu-latest, stable)	3m 50s
build (ubuntu-latest, beta)	3m 50s
build (macos-latest, 1.63.0)	3m 53s
build (ubuntu-latest, 1.63.0)	3m 51s
build (windows-latest, beta)	3m 43s
build (macos-latest, stable)	3m 54s
build (macos-latest, beta)	3m 52s
fuzz	1s
build-tx-sync (ubuntu-latest, beta)	1m 12s
build-tx-sync (ubuntu-latest, 1.75.0)	3m 51s
linting	2m 34s
build-tx-sync (macos-latest, beta)	3m 33s
benchmark	3m 50s
rustfmt	15s
build-tx-sync (macos-latest, stable)	1m 38s
build (windows-latest, stable)	3m 42s
incremental-mutants	3m 51s
check_release	2m 10s
check_commits	1s
build-tx-sync (macos-latest, 1.75.0)	1s
	1h 5m 2s

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