Add HF-standard offline package (auto_map + modeling_kbert_mtl.py)

config.json

@@ -62,7 +62,7 @@
   "problem_type": null,
   "_name_or_path": "klue/bert-base",
   "transformers_version": "4.27.0",
-  "model_type": "kbert_mtl",
+  "model_type": "bert",
   "vocab_size": 32000,
   "hidden_size": 768,
   "num_hidden_layers": 12,