Refactor op_div: fix bug + enable Half/Bfloat16

[manuelcandales]

Reviewed By: SS-JIA

Differential Revision: D81169893

[pytorch-bot]

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• Multiple CI trunk failures after landing https://github.com/pytorch/pytorch/pull/161002

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• periodic / test-models-linux (buck2, mv3, portable, linux.2xlarge, 90) / linux-job (gh)
• periodic / test-models-linux (buck2, mv3, xnnpack-quantization-delegation, linux.2xlarge, 90) / linux-job (gh)
• periodic / test-models-linux (cmake, mv3, portable, linux.2xlarge, 90) / linux-job (gh)
• periodic / test-models-linux (cmake, mv3, xnnpack-quantization-delegation, linux.2xlarge, 90) / linux-job (gh)
• periodic / test-models-linux (cmake, vit, portable, linux.2xlarge, 90) / linux-job (gh)
• periodic / test-models-linux (cmake, vit, xnnpack-quantization-delegation, linux.2xlarge, 90) / linux-job (gh)

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This pull request was exported from Phabricator. Differential Revision: D81169893