Support loading builtin methods from Java with different names

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

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