[hotfix] Do not import torch.ao.quantization._pt2e from dynamo (#100194)
Summary: Importing torch.ao.quantization._pt2e from dynamo led to
internal test failures related to memory profiling. For now,
let's express the path using a simple string instead.
Reviewers: jerryzh168, kimishpatel
Pull Request resolved: https://github.com/pytorch/pytorch/pull/100194
Approved by: https://github.com/jerryzh168
