Validation-Pipeline Check does not show in `Checks` tab of PR

[Trenly]

Previously, the validation pipeline runs would show in the checks tab as a separate check. They no longer appear.

[stephengillie]

I also noticed this change, but haven't heard if this was intentional or not. So I do not know if it's a bug or a feature request.

[KarbitsCode]

This has been happening since migration to new infrastructure (#173274), which I did notice and ask @stephengillie about this before (#174025 (comment))

[stephengillie]

Oh, I had forgotten. It might be due to the infrastructure change.