SIGN IN SIGN UP

Bump torchao + add unit tests for torchao kernels (#9396)

### Summary
This PR bumps the torchao pin and adds unit tests and documentation for
the lowbit torchao kernels.

### Test plan
New CI test
S
Scott Roy committed
1a9a59b94491f03620dce622fee922c1d2bc1fa7
Parent: 1300cda
Committed by GitHub <noreply@github.com> on 3/20/2025, 8:12:23 PM