[MoE Refactor] Oracle Select FP8+NVFP4 Kernels In Priority

[robertgshaw2-redhat]

Purpose

• update oracles to have notion of priority of kernels
• update kernels to have standard interface for construction
• update kernels to have registration of supported features

This allows us to:

• autoselect kernels across hardware and model architecture (enabling us to opt-into kernels like TRTLLM)
• verify that kernels support the deployment at init time rather than runtime (enabling clearer error messages)
• improve code reuse

Test Plan

Test Result

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Essential Elements of an Effective PR Description Checklist

• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan, such as providing test command.
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• (Optional) Release notes update. If your change is user facing, please update the release notes draft in the Google Doc.

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[robertgshaw2-redhat]

enabled run all tests

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# For mypy (substitute "3.10" with the failing version if needed)
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[mergify]

Hi @robertgshaw2-redhat, the pre-commit checks have failed. Please run:

uv pip install pre-commit
pre-commit install
pre-commit run --all-files

Then, commit the changes and push to your branch.

For future commits, pre-commit will run automatically on changed files before each commit.

Tip

Is mypy or markdownlint failing?

mypy and markdownlint are run differently in CI. If the failure is related to either of these checks, please use the following commands to run them locally:

# For mypy (substitute "3.10" with the failing version if needed)
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