Lies to students about "staff being informed" if nuisance failure

Code questions have some ad-hoc logic about classifying container launch issues as "nuisance failures":

https://github.com/inducer/relate/blob/35cd621191a9e161271673e99fdcdf3b4d771da1/course/page/code.py#L370-L398

If every container launch retry fails because of a nuisance issue, the current error message claims that "staff is being informed", but that is not true.