make gemv calls data_ptr_correct (#99161)
make gemv calls data_ptr_correct
Summary:
The following link for dgemv, for example, shows that all arguments
except for `y` are exclusively input arguments.
https://netlib.org/lapack/explore-html/d7/d15/group__double__blas__level2_gadd421a107a488d524859b4a64c1901a9.html
Test Plan: Rely on CI.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99161
Approved by: https://github.com/ezyang
