[TorchArrow][efficiency][3/n] variadic versions of op fused /unfused inference_wrapper_run_flat (#81133)
Summary:
Added `variadic` version (just an optimization) of the registered fused and unfused ops.
Reviewed By: tenpercent
Differential Revision: D37456033
Pull Request resolved: https://github.com/pytorch/pytorch/pull/81133
Approved by: https://github.com/tenpercent, https://github.com/qxy11
