MERGE BLOCKING

Current Status

Multiple failing workflows with different errors and reasons

Error looks like

Provide some way users can tell that this SEV is causing their issue.

Incident timeline (all times pacific)

Include when the incident began, when it was detected, mitigated, root caused, and finally closed.

User impact

How does this affect users of PyTorch CI?

Root cause

#115188 got reverted, but it's PRs on top of the stack wasn't

Mitigation

Reverted #115210

Prevention/followups

How do we prevent issues like this in the future?

cc @seemethere @malfet @pytorch/pytorch-dev-infra