[Quality of Life] Remove all usage of fmt.Errorf, use errors.Errorf (in runtime code) or blueprint.Errorf (in compiler code) instead

[JonathanMace]

errors.Errorf creates errors with stack traces; fmt.Errorf does not.

In most cases stack traces are useful. This issue is to go over the code base, changing the use of fmt.Errorf to errors.Errorf or blueprint.Errorf where appropriate.