[custom channels 4/5]: Extract PART4 from mega staging branch #15744

Job	Run time
RPC and mobile compilation check	2m 27s
lint code	3m 55s
cross compilation	11m 37s
check commits	21m 55s
check pinned dependencies (google.golang.org/grpc v1.59.0)	6s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	4s
sample configuration check	58s
Sqlc check	24s
run unit tests (btcd unit-cover)	17m 37s
run macOS itest	49m 13s
run unit tests (unit tags="kvdb_etcd")	19m 48s
check release notes updated	0s
run unit tests (unit tags="kvdb_postgres")	18m 8s
run unit tests (unit tags="kvdb_sqlite")	17m 13s
run windows itest	33m 42s
run unit tests (btcd unit-race)	36m 45s
run ubuntu itests (btcd, backend=btcd cover=1)	29m 43s
run unit tests (unit-module)	1m 3s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	38m 2s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	37m 36s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	39m 0s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	52m 37s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1h 9m 18s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	40m 30s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1h 11m 50s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	40m 4s
run ubuntu itests (neutrino, backend=neutrino cover=1)	36m 18s
finish	6s
	11h 29m 59s

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