[quant][fx] Ensure qconfig works for QAT with multiple modules (#63343)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63343
The previous implementation had a bug where we were trying to modify an ordered dict value while iterating through it.
This fixes it by creating a copy before modifying it.
Test Plan:
python test/test_quantization.py TestQuantizeFx.test_qconfig_qat_module_type
Imported from OSS
Reviewed By: raghuramank100
Differential Revision: D30346116
fbshipit-source-id: 0e33dad1163e8bff3fd363bfd04de8f7114d7a3a
