Revert "[BE] Enables support for pytorch ci build in ARC + introduces _linux-build-rg.yml. (#121930)"
This reverts commit 2c33e3a372c077badc561b4aad4997e52c03610a.
Reverted https://github.com/pytorch/pytorch/pull/121930 on behalf of https://github.com/huydhn due to I am seeing lots of inductor jobs failing after this change https://hud.pytorch.org/pytorch/pytorch/commit/2c33e3a372c077badc561b4aad4997e52c03610a. They looks unrelated though but this change updates Docker image so may be something sneaks in. I will try to revert this to see if it helps and will reland the change after ([comment](https://github.com/pytorch/pytorch/pull/121930#issuecomment-2000547641))
