CRAYSAT-1330: Specify image name directly in CFS session when possible

When possible, specify the desired resulting image name directly when
creating the CFS session instead of requiring a costly and failure-prone
image rename operation after the CFS configuration has been completed.

This greatly improves the reliability and performance of `sat bootprep`
for image customization.

Test Description:
Not tested yet.

sat/cli/bootprep/input/image.py

@@ -447,13 +447,21 @@ def rename_configured_image(self):
         if not configured_image_id:
             raise ImageCreateError('Failed to determine ID of configured image.')
 
-        LOGGER.info(f'Renaming configured image with ID {configured_image_id} to {self.name}')
+        if self.cfs_client.supports_customized_image_name:
+            LOGGER.debug(f'No rename necessary since CFS supports naming the configured '
+                         f'image {self.name}')
+            self.final_image_id = configured_image_id
+            return
+
+        rename_description = f'configured image with ID {configured_image_id} to {self.name}'
+        LOGGER.info(f'Renaming {rename_description}')
 
         try:
             self.final_image_id = self.ims_client.rename_image(configured_image_id, self.name)
         except APIError as err:
-            raise ImageCreateError(f'Failed to rename configured image with ID {configured_image_id} '
-                                   f'from {self.created_image_name} to {self.name}: {err}')
+            raise ImageCreateError(f'Failed to rename {rename_description}: {err}')
+
+        LOGGER.info(f'Renamed {rename_description}')
 
     def delete_overwritten_images(self):
         """Delete the images which were marked to be overwritten