Better error message than "overloaded or recursive method needs return type" for `(1)(2)`

From discussion on a separate (closed) issue #3737, it became clear that at least the error message should be improved.

In dotty:
```scala
scala> 1(2) 
1 |1(2)
  |^
  |overloaded or recursive method <none> needs return type
```

In scalac:
```scala
scala> (1)(2)
<console>:12: error: Int(1) does not take parameters
       (1)(2)
```