[MPS] Enable `arange` for `int8` and `uint8` dtypes (#101303)
Not sure, why it was not enabled previously.
Sort types in `AT_DISPATCH_MPS_TYPES` by group (floats first then integers) and size.
Test implicitly in `test_bernoulli`.
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### <samp>🤖 Generated by Copilot at 80c7ed7</samp>
> _`Char` and `Byte` types_
> _MPS can dispatch them now_
> _Winter of tensors_
Pull Request resolved: https://github.com/pytorch/pytorch/pull/101303
Approved by: https://github.com/huydhn, https://github.com/ZainRizvi, https://github.com/atalman, https://github.com/kulinseth
