Associated Types with matching names will conflict

[stephen-hawley]

If I have these two PATs:

public protocol getter {
    associatedtype value
    func get () -> value
}
public protocol setter {
    associatedtype value
    func set (newValue: value)
}
// and a function like this:
public func doAThing<T:setter, U:getter> (a: T, b: U) {
}

There will be a name conflict in the generated C# function:

public void DoAThing<T, U, ATvalue, ATvalue> (T:a, U: b) where T: IGetter<ATvalue>, U: ISetter<ATvalue> {
}

There will be two ATvalue generics.
There is a single entry point to generate the C# generic name for an associated type in OverrideBuilder. Currently it selects ATName where Name is the name of the associated type. To avoid name conflicts, this should be set instead to something like ATModule_Proto_Name where Module is the module name, Proto is the protocol name and Name is the associated type name.