fix: FeastExtrasDependencyImportError when using SparkOfflineStore without S3 (feast-dev#4594)

* Import aws_utils only if using s3.

Signed-off-by: Aloysius Lim <aloysius.lim@cuezen.com>

* Lint.

Signed-off-by: Aloysius Lim <aloysius.lim@cuezen.com>

---------

Signed-off-by: Aloysius Lim <aloysius.lim@cuezen.com>

Author: aloysius-lim

sdk/python/feast/infra/offline_stores/contrib/spark_offline_store/spark.py

@@ -30,7 +30,6 @@
     RetrievalMetadata,
 )
 from feast.infra.registry.base_registry import BaseRegistry
-from feast.infra.utils import aws_utils
 from feast.repo_config import FeastConfigBaseModel, RepoConfig
 from feast.saved_dataset import SavedDatasetStorage
 from feast.type_map import spark_schema_to_np_dtypes
@@ -399,6 +398,8 @@ def to_remote_storage(self) -> List[str]:
 
                 return _list_files_in_folder(output_uri)
             elif self._config.offline_store.staging_location.startswith("s3://"):
+                from feast.infra.utils import aws_utils
+
                 spark_compatible_s3_staging_location = (
                     self._config.offline_store.staging_location.replace(
                         "s3://", "s3a://"