[custom channels]: add decimal display to channel funding blob #3560

Job	Run time
Docker build check	3m 39s
Format check	21s
cross compilation	5m 18s
Compilation check	47s
run itests	9m 31s
Lint check	2m 52s
run itests postgres	18m 19s
migration version check	11s
go mod check	26s
RPC check	1m 20s
run LiT tests	13m 5s
sample configuration check	46s
Sqlc check	36s
test vector check	53s
run unit tests (unit-race)	11m 20s
run unit tests (unit-cover)	3m 8s
run unit tests (unit dbbackend=postgres)	6m 9s
finish	4s
	1h 18m 45s

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