resolve relative paths in YAML configuration for extra model paths (#5847)

Signed-off-by: bigcat88 <bigcat88@icloud.com>

utils/extra_config.py

@@ -24,5 +24,8 @@ def load_extra_path_config(yaml_path):
                 full_path = y
                 if base_path is not None:
                     full_path = os.path.join(base_path, full_path)
+                elif not os.path.isabs(full_path):
+                    yaml_dir = os.path.dirname(os.path.abspath(yaml_path))
+                    full_path = os.path.abspath(os.path.join(yaml_dir, y))
                 logging.info("Adding extra search path {} {}".format(x, full_path))
                 folder_paths.add_model_folder_path(x, full_path, is_default)