Remove excessive "errors instantiating template" message

I can believe that recent many fixes around IFTI had make the message unnecessary.
fix Issue 11125 - UFCS instantiation of template causes template constraint to be skipped

Additionally improve lambda formatting in error messages
Merge pull request #2589 from 9rnsr/fix11125

Issue 11125 - UFCS instantiation of template causes template constraint to be skipped