Remove duplicate tests from JS compiler test set. Merge chages to common compiler tests

compiler/testData/codegen/box/callableReference/function/extensionFromTopLevelStringNoArgs.kt

@@ -1,8 +1,18 @@
+fun run(arg1: A, funRef:A.() -> String): String {
+    return arg1.funRef()
+}
+
 class A
 
 fun A.foo() = "OK"
 
 fun box(): String {
     val x = A::foo
-    return x(A())
+    var r = x(A())
+    if (r != "OK") return r
+
+    r = run(A(), A::foo)
+    if (r != "OK") return r
+
+    return "OK"
 }