Adding `mps` as device for `Pipeline` class
Author: fnhirwa
Pull request: yes

# What does this PR do?
This PR adds `mps` device to the Pipeline class and also adds the `CPU` fallback env for torch as `torch.backends.mps` hase some functions unsupported, check here https://github.com/pytorch/pytorch/issues/77764
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Fixes https://github.com/huggingface/transformers/issues/30007


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Comments:
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