Updating unit tests and adding feature store marketplace requirements

Author: harsh97

ads/feature_store/docs/requirements.txt

@@ -1,5 +1,4 @@
-autodoc
-nbsphinx
+autodoc nbsphinx
 sphinx
 sphinxcontrib-napoleon
 sphinx_copybutton

test-requirements-operators.txt

@@ -1,4 +1,5 @@
 -r test-requirements.txt
 -e ".[forecast]"
+-e ".[feature-store-marketplace]"
 darts
 plotly

tests/unitary/with_extras/operator/test_common_backend_factory.py

@@ -81,13 +81,7 @@ def setup_method(self):
         # expected backends
         self.mock_supported_backends = tuple(
             set(BackendFactory.BACKENDS + BackendFactory.LOCAL_BACKENDS)
-            & set(
-                self.mock_operator_info.backends
-                + [
-                    BACKEND_NAME.OPERATOR_LOCAL.value,
-                    BACKEND_NAME.LOCAL.value,
-                ]
-            )
+            & set(self.mock_operator_info.backends)
         )
 
     @pytest.mark.parametrize(