[BUG] Method `for_storage_path` fails when instantiating the S3StorageClient

[Andre-Lx-Costa]

Description When instantiating the S3StorageClient through the for_storage_path classmethod the method fails.

The failure happens on this line where we attempt to access the base_client.sessionproperty which will be None, since it hasn't been instantiated.

It can be fixed either by:

• Instantiate the session if not already instantiated here

  @property
  def session(self):
      """
      Returns configured session (if any)
      """
      if self._session is None:
          self._session = self.initialize_session()
      return self._session

• Calling AwsClient.initialize_session here