[qunat][graphmode][fx] Enable test for non quantized input for cat (#52414)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52414
When the input is not quantized, we'll still quantize cat as requested by the qconfig, even though
it might be slower
Test Plan: Imported from OSS
Reviewed By: supriyar
Differential Revision: D26503554
fbshipit-source-id: 29d7c136711a12c124791c10ae436b61c1407668
