Bump numba version in circleCI config to 0.46.0. (#31435)
Summary:
The current numba version doesn't appear to actually work with our numba-cuda tests (numba.cuda.is_available()) fails.
Previous attempts to upgrade were blocked by https://github.com/numba/numba/issues/4368.
It's a bit unclear to me, but I believe 0.46.0 fixes the above version. I'm verify that we catch that issue in CI via https://github.com/pytorch/pytorch/pull/31434.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/31435
Differential Revision: D19166865
Pulled By: gchanan
fbshipit-source-id: e01fa48c577e35de178423db7a7f79ac3dd3894d
