Lint request: type parameter types shadowing interface types

[MichaelRFairhurst]

Similar to https://dart-lang.github.io/linter/lints/avoid_types_as_parameter_names.html

But instead to catch:

@override
String doStuff<String>(String x) { ... }

Users do this thinking they are getting template specialization. However, that's not what occurs. But they get no error, and then the resulting errors later on will look like "String is not a String. Try casting to a String."

This is assuming a base class defines

T doStuff<T>(T x) { ... }

Also occurs like this:

class A<T> {
  ...
}

class B<String> extends A<String> {
  ...
}

I know I've done that before on accident.

[srawlins]

Duplicate of #58093