[BE] Extend linter to detect DOS newlines (#86973)
Fix DOS newlines in `onednn/decompose_silu.[cpp|h]` introduced by https://github.com/pytorch/pytorch/pull/85591 as well as one in `.github/PULL_REQUEST_TEMPLATE.md`
Pull Request resolved: https://github.com/pytorch/pytorch/pull/86973
Approved by: https://github.com/huydhn, https://github.com/izaitsevfb
