Add an option to disable aten::cat in TE (re-revert) (#50101)
Summary:
This reverts commit ace78ddb6a2bdbf03f08c69767eba57306dd69ed.
Fixes #{issue number}
Pull Request resolved: https://github.com/pytorch/pytorch/pull/50101
Reviewed By: eellison
Differential Revision: D25784785
Pulled By: Krovatkin
fbshipit-source-id: cbb3d377e03303f6c8c71f4c59c6d90ab40d55f7
