Added helpful error when missing type parameters

[DuncanUszkay1]

Issue: #1181

When we were resolving a function from an identifier, we would call the resolveFunction method without any typeArguments. This guarantees an assertion failure in the event that the function requires type parameters.

This PR adds a check in the compileIdentifierExpression call just before it tries to resolve the function which will print out a nicer error message.

function doit<T,X,O,N>(x: T): T {
  return x
}
export function test(x: i32): void {
  let x = doit<String("hey!");
}

Before:

Results in:

ERROR: AssertionError: assertion failed

After

Results in:

ERROR TS2554: Expected 4 arguments, but got 0.

   let x = doit<String("hey!");
           ~~~~
 in main.ts(9,11)

ERROR AS225: Expression cannot be represented by a type.

   let x = doit<String("hey!");
                ~~~~~~~~~~~~~~
 in main.ts(9,16)

[dcodeIO]

Thanks!