Fix and Re-enable test_quantize_fx_lite_script_module.py (#88897)
Summary: After D35984526 (https://github.com/pytorch/pytorch/commit/416899d1a9fcb9dbc8bb66ed796b86360f573903), ```torch.ao.quantization.quantize_fx.prepare_fx``` requires passing in ```example_args```. This diff fixes the calls to ```prepare_fx``` in this test by adding in ```example_args``` as necessary.
Test Plan:
```
buck test caffe2/test:fx_quantization_lite
```
```
✓ ListingSuccess: caffe2/test:fx_quantization_lite : 3 tests discovered (39.689)
✓ Pass: caffe2/test:fx_quantization_lite - test_conv2d (mobile.test_quantize_fx_lite_script_module.TestLiteFuseFx) (44.451)
✓ Pass: caffe2/test:fx_quantization_lite - test_embedding (mobile.test_quantize_fx_lite_script_module.TestLiteFuseFx) (45.462)
✓ Pass: caffe2/test:fx_quantization_lite - test_submodule (mobile.test_quantize_fx_lite_script_module.TestLiteFuseFx) (45.933)
Summary
Pass: 3
ListingSuccess: 1
Finished test run: https://www.internalfb.com/intern/testinfra/testrun/3096224827259146
```
Differential Revision: D41227335
Pull Request resolved: https://github.com/pytorch/pytorch/pull/88897
Approved by: https://github.com/dagitses
