feature: add support for describe_endpoint_config to session (#5193)

* feature: add support for describe_endpoint_config to session

* fix: resolve codestyle violations in describe_endpoint_config

Fixes the flake8 and black failures reported by the codestyle-doc-tests
check on PR #5193:

- Remove trailing whitespace on the blank line preceding the new method
  (flake8 W293 at session.py:5370).
- Wrap the describe_endpoint_config call so the line fits within the
  100-character limit enforced by black 24.3.0.

---------

Co-authored-by: Mohamed Zeidan <81834882+mohamedzeidan2021@users.noreply.github.com>
Co-authored-by: Mohamed Zeidan <zeidmo@amazon.com>

Author: 3 people

src/sagemaker/session.py

@@ -5368,6 +5368,17 @@ def describe_endpoint(self, endpoint_name):
         response = self.sagemaker_client.describe_endpoint(EndpointName=endpoint_name)
         return response
 
+    def describe_endpoint_config(self, endpoint_config_name):
+        """Describe an Amazon SageMaker ``EndpointConfig``.
+
+        Args:
+            endpoint_config_name (str): Name of the Amazon SageMaker ``EndpointConfig`` to describe.
+        """
+        response = self.sagemaker_client.describe_endpoint_config(
+            EndpointConfigName=endpoint_config_name
+        )
+        return response
+
     def delete_endpoint(self, endpoint_name):
         """Delete an Amazon SageMaker ``Endpoint``.