[c10d] Enhance broadcastUniqueNCCLID error reporting (#94752)
When this error is hit, usually it is because rank 0 has hit an error
and crashed before setting the unique ID on rank 0. However, in many job
scheduling tools the rank 0 error is not clearly reported and user must look
for it, so add a small log reminding users to do so.
Differential Revision: [D43245190](https://our.internmc.facebook.com/intern/diff/D43245190/)
**NOTE FOR REVIEWERS**: This PR has internal Meta-specific changes or comments, please review them on [Phabricator](https://our.internmc.facebook.com/intern/diff/D43245190/)!
Pull Request resolved: https://github.com/pytorch/pytorch/pull/94752
Approved by: https://github.com/H-Huang
