[CI] Extract torch build as a standalone job

[chuanqi129]

Extract PyTorch build as a standalone job for CI/CD.
Add PyTorch build fallback mechanism to last known good commit tracked in #1280, and add a comment for new build failure.

1. created issue [DONT CLOSE] Last Known Workable Pytorch Commits #1280 to track latest workable pytorch main commit
2. ci test always pull latest pytorch main with torch-xpu-ops PR branch to build, success goto 3, failed goto 4
3. update commit in 1, continue to do ci tests
4. add comment on issue [DONT CLOSE] Last Known Workable Pytorch Commits #1280 with issued pytorch commit, and read the commit in 1 and rebuild the pytorch, continue to do ci tests