🐛 Bug Report: Input validators (class-validator) on the server are not really enforcing the validation

When you use the GQL playground or similar, to trigger a query or mutation and sending input parameters that do not confirm to specified input validators, e.g. `@IsEmail()` - the input validator is ignored and you will not get a validation error.

Expected:
You get a validation error when sending inputs that are not according to the specified types / formats.