feat: enable xpu support for meta-reference stack

[dvrogozh]

This PR adds support of non-cuda XPU backend device into meta-reference stack path. Submitting as a draft PR to facilitate discussion around another patch in llama-models:

• feat: support non-cuda devices for text and vision models llama-models#233

Requires: meta-llama/llama-models#233

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[ashwinb]

@dvrogozh are you interesting in moving forward with this change? if so, could you add a Test Plan?

[dvrogozh]

@dvrogozh are you interesting in moving forward with this change?

@ashwinb, thank you for taking a look. Yes, I plan to move forward with this PR. The reason it's currently a draft is it's dependency from PR in llama-models: meta-llama/llama-models#233 which should be reviewed and merged first. I am waiting for its review. Can you help with that?

if so, could you add a Test Plan?

Yes, sure, I will help adding tests covering different devices. If you need anything specific, please, let me know.