Update internal code for torch.geqrf (#56250)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56250
Moved `apply_geqrf` to `BatchLinearAlgebraKernel.cpp`. Added
`geqrf_stub` dispatch.
Test Plan: Imported from OSS
Reviewed By: albanD
Differential Revision: D27907362
Pulled By: mruberry
fbshipit-source-id: 6719464aef29dcf3bbbde060edf79f1e32fc8ad6
