Allow cancellation of pending splice funding negotiations #23070

Job	Run time
ext-test	7m 29s
benchmark	17m 12s
check_docs	28m 46s
fuzz_sanity	28m 46s
linting	2m 37s
check_release	2m 52s
build-bindings / build (self-hosted, 1.75.0)	15m 40s
rustfmt	14s
fuzz	28m 46s
tor-connect	5m 59s
build-nostd / build (self-hosted, 1.75.0)	28m 46s
build-cfg-flags / build (self-hosted, 1.75.0)	28m 46s
build-workspace / build (self-hosted, 1.75.0)	28m 46s
build-features / build (self-hosted, 1.75.0)	28m 46s
build-sync / build (self-hosted, 1.75.0)	28m 46s
coverage	1s
notify-failure	1s
	4h 42m 13s

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