Skip ChannelManager persistence after monitor update completion #23014

Job	Run time
benchmark	16m 58s
ext-test	5m 11s
check_release	3m 1s
tor-connect	5m 36s
check_docs	4m 58s
fuzz	52m 5s
rustfmt	16s
build-workspace / build (self-hosted, 1.75.0)	12m 36s
linting	2m 24s
fuzz_sanity	8m 43s
build-bindings / build (self-hosted, 1.75.0)	27m 56s
build-features / build (self-hosted, 1.75.0)	37m 46s
build-cfg-flags / build (self-hosted, 1.75.0)	18m 51s
build-nostd / build (self-hosted, 1.75.0)	21m 8s
build-sync / build (self-hosted, 1.75.0)	20m 38s
coverage	21m 54s
notify-failure	0s
	4h 20m 1s

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