chore: run librarian generate for google-cloud-datastore (googleapis#16773)

Author: jskeet

packages/google-cloud-datastore/.repo-metadata.json

@@ -13,4 +13,4 @@
     "product_documentation": "https://cloud.google.com/datastore",
     "release_level": "stable",
     "repo": "googleapis/google-cloud-python"
-}
+}

packages/google-cloud-datastore/tests/unit/test_client.py

@@ -12,8 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import Any, Dict
 import os
+from typing import Any, Dict
 
 import mock
 import pytest