acrn-config: create temporary scenario file folder if it doesn't exist

This commit creates the folder for hosting the temporary scenario .xml files if the folder doesn't exist to avoid the FileNotFound python exception.

Tracked-On: #4522
Signed-off-by: Tonny Tzeng <tonny.tzeng@intel.com>

Author: ttzeng

misc/acrn-config/config_app/views.py

@@ -527,6 +527,9 @@ def upload_scenario():
             tmp_scenario_name = 'tmp_' + scenario_file_name + '.xml'
             tmp_scenario_file = os.path.join(current_app.config.get('CONFIG_PATH'), board_type,
                                              'user_defined', tmp_scenario_name)
+            tmp_scenario_folder = os.path.dirname(tmp_scenario_file)
+            if not os.path.exists(tmp_scenario_folder):
+                os.makedirs(tmp_scenario_folder)
             if os.path.isfile(tmp_scenario_file):
                 os.remove(tmp_scenario_file)