[BUG]: re-join str type error_msgs using \n\t in general_checkpoint_io

[ericxsun]

🐛 Describe the bug

The type of error_msgs is str, we should not re-join it using \n\t.

ColossalAI/colossalai/checkpoint_io/general_checkpoint_io.py

Line 228 in d83c633

self.__class__.__name__, "\n\t".join(error_msgs)

otherwise it led to a weird output

n\t\'\n\ts\n\tc\n\to\n\tr\n\te\n\t.\n\tw\n\te\n\ti\n\tg\n\th\n\tt\n\t\'\n\t]\n\t"\n\t.\n\t 

Environment

No response