Simplify the code to create PR triggers
Simplify the code to create PR triggers

Also, create PR triggers for jobs that currently don't have them
(which is a bug), such as Debug and Release Windows x64 jobs.

poizan42/coreclr,cshung/coreclr,mmitche/coreclr,cshung/coreclr,poizan42/coreclr,wtgodbe/coreclr,krk/coreclr,cshung/coreclr,cshung/coreclr,wtgodbe/coreclr,cshung/coreclr,cshung/coreclr,wtgodbe/coreclr,poizan42/coreclr,krk/coreclr,mmitche/coreclr,krk/coreclr,mmitche/coreclr,wtgodbe/coreclr,wtgodbe/coreclr,poizan42/coreclr,mmitche/coreclr,krk/coreclr,mmitche/coreclr,mmitche/coreclr,wtgodbe/coreclr,poizan42/coreclr,krk/coreclr,poizan42/coreclr,krk/coreclr