Client - Allow specifying pipeline description when uploading (#3828)

* Client - Allow specifying pipeline description when uploading

Fixes #3825

* Implemented review feedback

sdk/python/kfp/_client.py

@@ -672,16 +672,22 @@ def _get_workflow_json(self, run_id):
     workflow_json = json.loads(workflow)
     return workflow_json
 
-  def upload_pipeline(self, pipeline_package_path, pipeline_name=None):
+  def upload_pipeline(
+    self,
+    pipeline_package_path: str = None,
+    pipeline_name: str = None,
+    description: str = None,
+  ):
     """Uploads the pipeline to the Kubeflow Pipelines cluster.
     Args:
       pipeline_package_path: Local path to the pipeline package.
       pipeline_name: Optional. Name of the pipeline to be shown in the UI.
+      description: Optional. Description of the pipeline to be shown in the UI.
     Returns:
       Server response object containing pipleine id and other information.
     """
 
-    response = self._upload_api.upload_pipeline(pipeline_package_path, name=pipeline_name)
+    response = self._upload_api.upload_pipeline(pipeline_package_path, name=pipeline_name, description=description)
     if self._is_ipython():
       import IPython
       html = 'Pipeline link <a href=%s/#/pipelines/details/%s>here</a>' % (self._get_url_prefix(), response.id)