Beat [0/4]: improve itest miner #14769

Job	Run time
RPC and mobile compilation check	1s
Sqlc check	1s
check commits	1s
cross compilation	1s
lint code	1s
sample configuration check	1s
run unit tests (btcd unit-cover)	1s
run unit tests (unit tags="kvdb_etcd")	1s
check pinned dependencies (google.golang.org/grpc v1.59.0)	1s
run unit tests (unit tags="kvdb_postgres")	1s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	1s
run unit tests (unit tags="kvdb_sqlite")	1s
run unit tests (btcd unit-race)	1s
run unit tests (unit-module)	1s
run macOS itest	1s
run windows itest	1s
run ubuntu itests (btcd, backend=btcd cover=1)	1s
check release notes updated	1s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	1s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	1s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	1s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	1s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	1s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	1s
run ubuntu itests (neutrino, backend=neutrino cover=1)	1s
finish	3s
	30s

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