[Splicing] Add reserve check to splicing #19762

Job	Run time
ext-test	7m 7s
coverage	18m 45s
check_release	2m 10s
build (self-hosted, 1.63.0)	1h 47m 58s
build (self-hosted, beta)	1h 27m 42s
build (macos-latest, stable)	1h 43m 24s
benchmark	16m 33s
build (macos-latest, 1.63.0)	2h 4m 30s
build (windows-latest, stable)	12m 45s
build-tx-sync (ubuntu-latest, beta)	4m 40s
build (self-hosted, stable)	1h 23m 26s
build-tx-sync (ubuntu-latest, 1.75.0)	4m 56s
fuzz	1h 15m 33s
build-tx-sync (macos-latest, beta)	6m 4s
build-tx-sync (macos-latest, 1.75.0)	6m 55s
build-tx-sync (macos-latest, stable)	6m 23s
build-tx-sync (ubuntu-latest, stable)	4m 42s
rustfmt	13s
linting	44s
	11h 14m 30s

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