build: set -DNDEBUG in Release (#32719)
Summary:
This might lead to silent undefined behaviour (e.g. with out-of-bound indices). This affects `test_multinomial_invalid_probs_cuda` which is now removed.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/32719
Test Plan:
* Build with VERBOSE=1 and manually inspect `less ndebug.build.log | grep 'c++' | grep -v -- -DNDEBUG` (only with nina on Linux)
* CI
Fixes https://github.com/pytorch/pytorch/issues/22745
Differential Revision: D20104340
Pulled By: yf225
fbshipit-source-id: 2ebfd7ddae632258a36316999eeb5c968fb7642c
