Support loading builtin methods from Java with different names

compiler/testData/diagnostics/tests/j+k/collectionOverrides/removeAt.kt

@@ -0,0 +1,22 @@
+// FILE: A.java
+abstract public class A<F> extends B<F> {
+    public F remove(int x) { }
+    public boolean remove(Object x) { }
+}
+
+// FILE: main.kt
+import java.util.*;
+
+abstract class B<T> : MutableList<T>, AbstractList<T>() {
+    override fun removeAt(index: Int): T = null!!
+    override fun remove(o: T): Boolean = null!!
+}
+
+fun main(a: A<String>, b: B<String>, c: ArrayList<String>) {
+    a.remove("")
+    a.removeAt(0)
+    b.remove("")
+    b.removeAt(0)
+    c.remove("")
+    c.removeAt(0)
+}