Fix the pt2e UT path after refactor (#99402)
**Summary**
After https://github.com/pytorch/pytorch/pull/99064 and https://github.com/pytorch/pytorch/pull/99065 merged, the pt2e UT path has changed, also need to change the module path in `test/test_quantization.py`. Then we can run these tests in top level's test directory.
**Test Plan**
```
cd test && python -u -m pytest test_quantization.py -k TestQuantizePT2E
cd test && python -u -m pytest test_quantization.py -k TestQuantizePT2EModels
cd test && python -u -m pytest test_quantization.py -k TestQuantizePT2EFX
cd test && python -u -m pytest test_quantization.py -k TestQuantizePT2EFXX86Inductor
cd test && python -u -m pytest test_quantization.py -k TestQuantizePT2EFXModels
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99402
Approved by: https://github.com/jerryzh168
