[PT2E][Quant] Support for embedding op quantization via
ExecuTorchNativeQuantizer (#99106)
ExecuTorchNativeQuantizer
ExecuTorchNativeQuantizer is a terribly name, I admit, however lets fix it once
we align on what the quantized kernel lib within executorch runtime should be called
Differential Revision: [D44986258](https://our.internmc.facebook.com/intern/diff/D44986258/)
**NOTE FOR REVIEWERS**: This PR has internal Meta-specific changes or comments, please review them on [Phabricator](https://our.internmc.facebook.com/intern/diff/D44986258/)!
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99106
Approved by: https://github.com/jerryzh168
