NXP backend: Unify quantization function inplementations

[StrycekSimon]

Summary

Unifies implementation of model quantization between executorch_pipeline.py and example aot_neutron_compile.py and introduces documented single function interface.

Test plan

Should be covered by already existing unit tests.

cc @robert-kalmar @JakeStevens @digantdesai

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15044

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• [ROCm][CI] Machines under the label linux.rocm.gpu.2 are undergoing maintenance.

❌ 6 New Failures, 5 Unrelated Failures

As of commit fd1a7df with merge base afd98fe ():

NEW FAILURES - The following jobs have failed:

• Build Presets / apple (ios-simulator) / build (gh)
  /Applications/Xcode_15.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk/usr/include/c++/v1/__system_error/errc.h:128:43: error: use of undeclared identifier 'ECONNABORTED'
• pull / test-qnn-wheel-packages-linux (3.10) / linux-job (gh)
  RuntimeError: Command docker exec -t 6a9d7bf3b0003ec911dbe345fde57b98baefb239258583d467839b871377814b /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.11) / linux-job (gh)
  RuntimeError: Command docker exec -t 0c201bb6638eb1fc18c7439c45bc702dd3bc9d1040eabacb457d067b76b99473 /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.12) / linux-job (gh)
  RuntimeError: Command docker exec -t 014fa5105ad0e50ad604ca08be17d7ee8c2d85f561257c83a416a5f124e11f8a /exec failed with exit code 1
• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t e726e5f5cf4b658559ccd1124b00fba1a71eced00e44ac06290b18b93439c78e /exec failed with exit code 1
• Test CUDA Builds / export-voxtral-cuda-artifact / linux-job (gh)
  RuntimeError: Command docker exec -t 14c753c18efac47d06af8e4bb9341b42e26452f1d78984ac7618264a03dc816d /exec failed with exit code 2

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• pull / unittest / linux / linux-job (gh) (matched linux rule in flaky-rules.json)
  The runner has received a shutdown signal. This can happen when the runner service is stopped, or a manually started runner is canceled.
• pull / unittest / macos / macos-job (gh) (similar failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest-buck / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)
• pull / unittest-editable / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[StrycekSimon]

@pytorchbot label "module: nxp"

[StrycekSimon]

Let's wait for a review from one of my colleagues from NXP this time. 😀 In a meantime, I will check the red signals...

[StrycekSimon]

Those failing tests are unrelated to this PR. Also, I noticed the same error messages in other PRs.