[quant][refactor tests] Move test_qat_module into test_quantize_eager_qat (#58928)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/58928
Test Plan:
python test/test_quantization.py TestConvBNQATModule
Imported from OSS
Reviewed By: raghuramank100
Differential Revision: D28683925
fbshipit-source-id: 59d240d521c8067a344c9bdf4bec94e82f52e76f
