[CI]: Quantization tests cleanup

[njhill]

Weight loading multiple gpus // quantization test // quantized Model Tests

• Weight loading → convert this to nightly
• Quantization/Quantized Models Test → consolidate + potentially reduce the number of parameters / remove some of the low priority integrations

[killershrimp]

I can take this, could you please assign to me?

[njhill]

Thanks @killershrimp!