JS: create new common directory for all generated tests, migrate several tests there

js/js.translator/testData/box/callableReference/function/classMemberFromClass.kt

@@ -0,0 +1,14 @@
+// This test was adapted from compiler/testData/codegen/box/callableReference/function/.
+package foo
+
+class A {
+    fun bar(k: Int) = k
+
+    fun result() = (A::bar)(this, 111)
+}
+
+fun box(): String {
+    val result = A().result()
+    if (result != 111) return "Fail $result"
+    return "OK"
+}