add workflow name to conclusions dictionary in trymerge (#82026)
Xla hash updates were failing because the merge rules json was looking for the name of the job in the format `<workflow name> / <job name>` but try merge just has `<job name>`.
An easier solution would be to just get rid of pull in the merge rules but I think it would be better to keep to this naming convention.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/82026
Approved by: https://github.com/kit1980, https://github.com/zengk95, https://github.com/huydhn
