Adding `mps` as device for `Pipeline` class (#30080)
* adding env variable for mps and is_torch_mps_available for Pipeline
* fix linting errors
* Remove environment overide
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>
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Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>
