Revert "pt2: make aot_eager backend handle basic float8 operations (#107642)"
This reverts commit 24147a8e1c6855489c1669c612ff5cb1b09a09dd.
Reverted https://github.com/pytorch/pytorch/pull/107642 on behalf of https://github.com/huydhn due to Sorry for reverting this, but it is failing Windows CPU test in trunk. The Windows failures on your PR looks related I think ([comment](https://github.com/pytorch/pytorch/pull/107642#issuecomment-1688999380))
