[quant][graphmode][fx] Fix the calls to load_arg in quantization_patterns.py (#62376)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62376
load_arg(quantized=...) accepts a dictionary from index to dtype,
not a list of dtype, the call is just to make sure the inputs are quantized with correct
dtype
Test Plan:
python test/test_quantization.py TestQuantizeFx
python test/test_quantization.py TestQuantizeFxOps
Imported from OSS
Reviewed By: heitorschueroff
Differential Revision: D29979711
fbshipit-source-id: 8499976ac5df8eb2019c3beae573dec6c9a56247
