Fix typed throws

[tejassharma96]

Fixes the problems in #574

[tejassharma96]

this now generates:

override func typedThrows() throws(Error) -> Int? {
    return try cuckoo_manager.callThrows(
        "typedThrows() throws(Error) -> Int?",
        parameters: (),
        escapingParameters: (),
        errorType: Error.self,
        superclassCall: super.typedThrows(),
        defaultCall: __defaultImplStub!.typedThrows()
    )
}

override func genericWithTypedThrows<T> (_ p0: T) throws(StubError) {
    return try cuckoo_manager.callThrows(
        "genericWithTypedThrows<T> (_ p0: T) throws(StubError)",
        parameters: (p0),
        escapingParameters: (p0),
        errorType: StubError.self,
        superclassCall: super.genericWithTypedThrows(p0),
        defaultCall: __defaultImplStub!.genericWithTypedThrows(p0)
    )
}

override func asyncTypedThrow() async throws(Error) -> Int? {
    return try await cuckoo_manager.callThrows(
        "asyncTypedThrow() async throws(Error) -> Int?",
        parameters: (),
        escapingParameters: (),
        errorType: Error.self,
        superclassCall: await super.asyncTypedThrow(),
        defaultCall: await __defaultImplStub!.asyncTypedThrow()
    )
}

override func asyncGenericWithTypedThrows<T> (_ p0: T) async throws(StubError) {
    return try await cuckoo_manager.callThrows(
        "asyncGenericWithTypedThrows<T> (_ p0: T) async throws(StubError)",
        parameters: (p0),
        escapingParameters: (p0),
        errorType: StubError.self,
        superclassCall: await super.asyncGenericWithTypedThrows(p0),
        defaultCall: await __defaultImplStub!.asyncGenericWithTypedThrows(p0)
    )
}

override func untypedThrows() throws {
    return try cuckoo_manager.callThrows(
        "untypedThrows() throws",
        parameters: (),
        escapingParameters: (),
        errorType: Swift.Error.self,
        superclassCall: super.untypedThrows(),
        defaultCall: __defaultImplStub!.untypedThrows()
    )
}

[tejassharma96]

note that it correctly uses Error.self when needed but untypedThrows() uses Swift.Error.self instead

[tejassharma96]

ci error seems unrelated to my change. likely this: actions/runner-images#12541

I've updated the simulator to 18.6

[tejassharma96]

hey @MatyasKriz, would love to get some eyes on this when you have a minute :)

[MatyasKriz]

Hey, I'm aware, but I couldn't find the time and now I'm vacationing, but I'll go through this when I return, promise!

[tejassharma96]

ah, my bad! sorry for interrupting your vacation, enjoy! :)

[MatyasKriz]

Damn, and then I forgot about it. Sorry! Merging.