[1/3] Graph RIP: refactor+graph: move all graph related DB code to the graph package #16636

Job	Run time
lint code	3m 46s
check commits	24m 19s
cross compilation	1m 48s
RPC and mobile compilation check	2m 8s
sample configuration check	45s
Sqlc check	2m 51s
run unit tests (btcd unit-cover)	10m 32s
check pinned dependencies (google.golang.org/grpc v1.59.0)	4s
run unit tests (unit tags="kvdb_etcd")	18m 15s
run macOS itest	1m 27s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	4s
run unit tests (unit tags="kvdb_postgres")	17m 20s
run unit tests (unit tags="kvdb_sqlite")	15m 2s
run unit tests (btcd unit-race)	34m 43s
run windows itest	4m 9s
run unit tests (unit-module)	2m 12s
run ubuntu itests (btcd, backend=btcd cover=1)	1m 28s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	1m 30s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	1m 28s
check release notes updated	4s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	1m 28s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	1m 35s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1m 28s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	1m 34s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1m 34s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	1m 34s
run ubuntu itests (neutrino, backend=neutrino cover=1)	1m 38s
finish	5s
	2h 34m 51s

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