[wallet 2/3]: refactor funding logic to use allocation code #3992

Job	Run time
Compilation check	1m 4s
cross compilation	12m 53s
Docker build check	3m 44s
Format check	20s
run itests	11m 50s
run itests postgres	21m 15s
Lint check	2m 41s
migration version check	9s
go mod check	16s
RPC check	1m 8s
run LiT tests	16m 29s
sample configuration check	41s
Sqlc check	40s
test vector check	55s
run unit tests (unit-race)	15m 27s
run unit tests (unit-cover)	2m 13s
run unit tests (unit dbbackend=postgres)	5m 56s
finish	6s
	1h 37m 47s

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