Reload channelmanager with channel data from monitors #21104

Job	Run time
rustfmt	16s
ext-test	7m 6s
benchmark	17m 8s
linting	2m 23s
build (self-hosted, beta)	1h 16m 50s
build (self-hosted, stable)	1h 16m 52s
check_release	3m 3s
check_docs	5m 27s
build (macos-latest, stable)	1h 8m 43s
build (windows-latest, stable)	1h 16m 47s
build (macos-latest, 1.75.0)	34m 37s
build (self-hosted, 1.75.0)	23m 27s
build-tx-sync (macos-latest, stable)	8m 9s
build-tx-sync (ubuntu-latest, stable)	5m 6s
fuzz	1h 7m 2s
build-tx-sync (ubuntu-latest, beta)	4m 58s
build-tx-sync (macos-latest, 1.75.0)	5m 29s
build-tx-sync (macos-latest, beta)	9m 27s
build-tx-sync (ubuntu-latest, 1.75.0)	5m 32s
coverage	9m 33s
	8h 27m 55s

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