[inductor] When generating debug logs don't fail if nvcc not found (#120346)
If nvcc isn't found subprocess throws a CalledProcessError
Differential Revision: [D54028438](https://our.internmc.facebook.com/intern/diff/D54028438/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/120346
Approved by: https://github.com/Skylion007, https://github.com/shunting314
