Fix CloudMemorystoreCreateInstanceAndImportOperator operator (#7856)

Author: mik-laj

airflow/providers/google/cloud/operators/cloud_memorystore.py

@@ -831,7 +831,7 @@ def execute(self, context: Dict):
 
         hook.import_instance(
             location=self.location,
-            instance=self.instance,
+            instance=self.instance_id,
             input_config=self.input_config,
             project_id=self.project_id,
             retry=self.retry,

tests/providers/google/cloud/operators/test_cloud_memorystore.py

@@ -320,7 +320,7 @@ def test_assert_valid_hook_call(self, mock_hook):
                 ),
                 mock.call().import_instance(
                     input_config=TEST_INPUT_CONFIG,
-                    instance=TEST_INSTANCE,
+                    instance=TEST_INSTANCE_ID,
                     location=TEST_LOCATION,
                     metadata=TEST_METADATA,
                     project_id=TEST_PROJECT_ID,