feat: Quantization Refactor

[BrandonGroth]

Description of the change

This PR adds the quantization refactor for the INT8/4:

• New file architecture per quantizer family
• Each quantizer uses "round-clip" order of operations consistent with PyTorch quantizers
• Each quantizer now has dequantize=False enabled
• Each quantizer now has "native PT" enabled
• All new functions come fully tested to a reference TorchQuantizer for the forward method

TODO:

• Refactor Qmax+Qminmax Per Group quantizer (if necessary)
• Find a way to ensure the backward pass is fully covered
• Lower testing duration

Related issues or PRs

N/A

How to verify the PR

run tests/quantizers pytest

Checklist for passing CI/CD:

• All commits are signed showing "Signed-off-by: Name <email@domain.com>" with git commit -signoff or equivalent
• PR title and commit messages adhere to Conventional Commits
• Contribution is formatted with tox -e fix
• Contribution passes linting with tox -e lint
• Contribution passes spellcheck with tox -e spellcheck
• Contribution passes all unit tests with tox -e unit

Note: CI/CD performs unit tests on multiple versions of Python from a fresh install. There may be differences with your local environment and the test environment.