[PyTorch Edge][QNNPack] Tighten Step Height for Indirection Buffers (#70530)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70530
```kernel_size + (output_width * step_width - 1) * kernel_height``` is more space than needed, and ```kernel_size + (output_width - 1) * step_width * kernel_height``` is just enough.
Test Plan: Phabricator Tests
Reviewed By: kimishpatel
Differential Revision: D32553599
fbshipit-source-id: 30f6d191705bcb25dc9bb7a91c6d7b99c3a348e5
