Revert "[BE] Dockerize PyTorch docs jobs (#100601)"
This reverts commit 2703684acf5643ca69ecfac4bdb861abe2a8aa41.
Reverted https://github.com/pytorch/pytorch/pull/100601 on behalf of https://github.com/huydhn due to Curiously, this breaks inductor jobs ([comment](https://github.com/pytorch/pytorch/pull/100601#issuecomment-1535515587))
