Descriptor: modify the Incorrect initialization path

issue:https://gitee.com/openharmony/build_lite/issues/I6CN24?from=project-issueSigned-off-by: Nlwx1153805 <longshining2@huawei.com>

hb_internal/common/config.py

@@ -58,7 +58,7 @@ class Config(metaclass=Singleton):
                                                        None)
         self._subsystem_config_json = config_content.get(
             'subsystem_config_json', None)
-        self._subsystem_config_overlay_json = self._product_path + '/subsystem_config_overlay.json'
+        self._subsystem_config_overlay_json = ''
         self.fs_attr = set()
         self.platform = platform.system()