stable version of grpc codegen, drop kv_remote_v1 support (#1285)

cmd/rpcdaemon/cli/config.go

ethdb/kv_abstract_test.go

ethdb/kv_remote.go

ethdb/kv_remote2.go

ethdb/remote/db_grpc.pb.go

ethdb/remote/ethbackend_grpc.pb.go

ethdb/remote/kv.pb.go

ethdb/remote/kv.proto

ethdb/remote/kv_grpc.pb.go

ethdb/remote/remotedbserver/db.go

ethdb/remote/remotedbserver/ethbackend.go

ethdb/remote/remotedbserver/server.go

go.mod

go.sum