Fix MPS compatibility in get_1d_sincos_pos_embed_from_grid #12432 (#12449)
* Fix MPS compatibility in get_1d_sincos_pos_embed_from_grid #12432
* Fix trailing whitespace in docstring
* Apply style fixes
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Co-authored-by: Dhruv Nair <dhruv.nair@gmail.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>