Beat itest [1/3]: remove the usage of standby nodes #16869

Job	Run time
check commits	10m 15s
cross compilation	30m 13s
check pinned dependencies (google.golang.org/grpc v1.59.0)	5s
RPC and mobile compilation check	3m 24s
lint code	6m 42s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	3s
sample configuration check	1m 51s
Sqlc check	2m 59s
run unit tests (btcd unit-cover)	19m 7s
run ubuntu itests	0s
run unit tests (unit tags="kvdb_etcd")	20m 50s
run windows itest	0s
run unit tests (unit tags="kvdb_postgres")	21m 16s
run unit tests (unit tags="kvdb_sqlite")	18m 11s
run macOS itest	0s
run unit tests (btcd unit-race)	40m 4s
check release notes updated	0s
run unit tests (unit-module)	1m 4s
finish	6s
	2h 56m 10s

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