fix: gptq and llmcompressor tests

[johannaSommer]

Description

This PR attempts to fix failing gptq and llmcompressor tests.
GPTQ: RuntimeError: CUDA error: no kernel image is available for execution on the device --> indicates that the device for the nightly tests might not be compatible with this method and we should mark it as "high"
LLMCompressor: TypeError: unhashable type: 'weakref.CallableProxyType' --> fixed by not wrapping input model into weakref

Related Issue

None.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Ran tests locally

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Additional Notes

None.

[johnrachwan123]

LGTM, I will take some to investigate this on my side as well