Revert "Mark XLA Linux jobs as unstable temporarily (#92634)"
This reverts commit 3cc103132205820fc0c571e3e68dd5e9b5b85727.
Reverted https://github.com/pytorch/pytorch/pull/92634 on behalf of https://github.com/huydhn due to XLA has been forward fixed by https://hud.pytorch.org/pytorch/pytorch/commit/341613fc14a4b8f57d45bb2ff4651fb2af489eaa
