Teach isort that imports from utils are first-party imports (#9500)

tests/pytype_test.py

@@ -19,10 +19,11 @@ import traceback
 from collections.abc import Iterable, Sequence
 
 import pkg_resources
-import utils
 from pytype import config as pytype_config, load_pytd  # type: ignore[import]
 from pytype.imports import typeshed  # type: ignore[import]
 
+import utils
+
 TYPESHED_SUBDIRS = ["stdlib", "stubs"]
 TYPESHED_HOME = "TYPESHED_HOME"
 _LOADERS = {}