[Splicing] Tx negotiation during splicing #19646

Job	Run time
ext-test	4m 48s
linting	2m 33s
coverage	11m 8s
benchmark	15m 57s
build-tx-sync (ubuntu-latest, beta)	4m 54s
build-tx-sync (ubuntu-latest, stable)	4m 47s
build-tx-sync (ubuntu-latest, 1.75.0)	5m 10s
build-tx-sync (macos-latest, stable)	5m 54s
build-tx-sync (macos-latest, 1.75.0)	7m 14s
build-tx-sync (macos-latest, beta)	6m 3s
check_release	2m 6s
fuzz	53m 39s
build (self-hosted, beta)	52m 23s
build (self-hosted, stable)	51m 0s
build (self-hosted, 1.63.0)	1h 3m 26s
build (macos-latest, stable)	1h 25m 58s
build (macos-latest, 1.63.0)	2h 11m 43s
build (windows-latest, stable)	12m 17s
rustfmt	15s
	8h 41m 15s

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