Add the exercises without canonical data to test generator

[ErikSchierboom]

Right now we have to manually check to see if an exercise gets canonical data in the future. I'd like to have it integrated into the generator with some sort of flag saying "this doesn't have data" and then it can start throwing exceptions in the future if the data is created so we know we'll have to implement it (keeping my fingers crossed that all exercises will have canonical data someday)

This is a copy from exercism/csharp#434

[ErikSchierboom]

I'll have a go at this.