trymerge to ignore certain failures (#91134)
For any failure in dr ci listed as "flaky" or "broken trunk" (aka anything not "new failures"), these get marked as "ok to fail".
If there are a small number (currently set to 3) ok to fail jobs, merge can still continue.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/91134
Approved by: https://github.com/huydhn, https://github.com/malfet, https://github.com/seemethere
