[custom channels 1/5]: extract PART1 from mega staging branch #15561

Job	Run time
lint code	9m 58s
Sqlc check	5m 3s
check commits	14m 5s
cross compilation	15m 49s
check pinned dependencies (google.golang.org/grpc v1.59.0)	4s
run macOS itest	47m 9s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	4s
RPC and mobile compilation check	7m 53s
sample configuration check	6m 31s
run ubuntu itests (btcd, backend=btcd cover=1)	29m 47s
run unit tests (btcd unit-cover)	17m 30s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	37m 46s
run windows itest	32m 31s
run unit tests (unit tags="kvdb_etcd")	19m 42s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	37m 4s
run unit tests (unit tags="kvdb_postgres")	18m 22s
run unit tests (unit tags="kvdb_sqlite")	17m 9s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	38m 19s
check release notes updated	0s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	51m 51s
run unit tests (btcd unit-race)	35m 49s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1h 9m 2s
run unit tests (unit-module)	57s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	40m 11s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1h 5m 35s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	40m 49s
run ubuntu itests (neutrino, backend=neutrino cover=1)	36m 26s
finish	5s
	11h 35m 31s

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