[JS IR] Review remarks

- Move origin to common place
- Add comments and todo about solution
- Remove MODULE directive from tests
- Add test with in-place using of js function

js/js.translator/testData/box/reflection/kJsClassWithJsCall.kt

@@ -0,0 +1,38 @@
+import kotlin.reflect.KClass
+
+// FILE: main.kt
+external abstract open class A(
+    o: String
+) {
+    abstract val k: String
+
+    fun test(): String
+}
+
+class B(
+    o: String
+) : A(o) {
+    override val k = "K"
+}
+
+external fun test(
+    klazz: Any
+) : B
+
+fun box(): String {
+    return test(B::class.js).test()
+}
+
+// FILE: test.js
+
+function test(classType) {
+    return new classType("O")
+}
+
+function A(o) {
+    this.o = o
+}
+
+A.prototype.test = function() {
+    return this.o + this.k
+}