Revert "[export] Refactor `constrain_as_value` and `constrain_as_size` (#106591)"
This reverts commit 18989890bfc4d74dbf4a175d425b5b291e09cb8b.
Reverted https://github.com/pytorch/pytorch/pull/106591 on behalf of https://github.com/izaitsevfb due to Breaks inductor test on trunk ([comment](https://github.com/pytorch/pytorch/pull/106591#issuecomment-1675069091))
