[ROCm] [ROCm 2.10+] enable fp16 dot in PyTorch backend (#30431)
Summary:
ROCm 2.10 has a hdot implementation. Use it and enable test.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/30431
Differential Revision: D20776784
Pulled By: ezyang
fbshipit-source-id: a192a701eb418dac2015e300563ade691c24903e
