[custom channels]: update to unmerged release branch of lnd 0.18.4-beta #3176

Job	Run time
Docker build check	1m 52s
cross compilation	27s
Compilation check	1m 43s
Format check	2m 48s
run itests	4m 6s
run itests postgres	5m 0s
Lint check	1m 24s
migration version check	17s
go mod check	2m 43s
RPC check	1m 16s
run LiT tests	11m 55s
sample configuration check	4m 0s
Sqlc check	5m 3s
run unit tests (unit-race)	7m 19s
test vector check	4m 10s
run unit tests (unit-cover)	6m 24s
run unit tests (unit dbbackend=postgres)	5m 21s
finish	2s
	1h 5m 50s

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