tapchannel: validate proof courier before opening or accepting channels #3967

Job	Run time
Docker build check	3m 59s
Format check	41s
Compilation check	42s
cross compilation	12m 41s
run itests postgres	8m 14s
run itests	5m 44s
Lint check	2m 37s
migration version check	15s
go mod check	19s
RPC check	1m 13s
run LiT tests	10m 25s
sample configuration check	41s
Sqlc check	2m 53s
test vector check	1m 3s
run unit tests (unit-race)	15m 51s
run unit tests (unit-cover)	2m 4s
run unit tests (unit dbbackend=postgres)	5m 55s
finish	6s
	1h 15m 23s

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