Resolve outbound HTLC fails via `MonitorEvent`s #23227

Job	Run time
linting	2m 51s
fuzz_sanity	13m 52s
build-features / build (self-hosted, 1.75.0)	40m 13s
check_docs	6m 34s
build-sync / build (self-hosted, 1.75.0)	27m 39s
fuzz	57m 23s
check_release	3m 8s
build-workspace / build (self-hosted, 1.75.0)	14m 30s
tor-connect	7m 30s
benchmark	17m 33s
rustfmt	14s
build-bindings / build (self-hosted, 1.75.0)	20m 42s
build-cfg-flags / build (self-hosted, 1.75.0)	13m 55s
build-nostd / build (self-hosted, 1.75.0)	22m 8s
ext-test	5m 8s
coverage	19m 48s
notify-failure	0s
	4h 33m 8s

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