[quant][graphmode] Add quantization support for aten::cat (#34346)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/34346
Test Plan:
python test/test_jit.py
Imported from OSS
Differential Revision: D20589145
fbshipit-source-id: c9159fffa88cf25fcdccfcc4eef2622cf4b250b5
