lint: enable linters from buildkit

Skipping errname and testifylint

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

controller/pb/path.go

@@ -153,7 +153,6 @@ func ResolveOptionPaths(options *BuildOptions) (_ *BuildOptions, err error) {
 				}
 			}
 			ps = append(ps, p)
-
 		}
 		s.Paths = ps
 		ssh = append(ssh, s)

controller/remote/io.go

@@ -302,7 +302,6 @@ func attachIO(ctx context.Context, stream msgStream, initMessage *pb.InitMessage
 					out = cfg.stderr
 				default:
 					return errors.Errorf("unsupported fd %d", file.Fd)
-
 				}
 				if out == nil {
 					logrus.Warnf("attachIO: no writer for fd %d", file.Fd)