Revert "Replace _dynamo.config with an object instead of module (#96455)"
This reverts commit 3864207c2a71a3ba8dc13bcf9582a726a10292cd.
Reverted https://github.com/pytorch/pytorch/pull/96455 on behalf of https://github.com/DanilBaibak due to Break internal build ([comment](https://github.com/pytorch/pytorch/pull/96455#issuecomment-1576162237))
