[JS IR BE] Fix and refactor interop tests

js/js.translator/testData/box/native/callbackOptionalParameter.js

@@ -1,4 +1,4 @@
 function bar(a) {
-    a.foo_za3lpa$();
-    a.foo_za3lpa$(99);
+    a.foo();
+    a.foo(99);
 }

js/js.translator/testData/box/native/callbackOptionalParameter.kt

@@ -5,6 +5,7 @@ package foo
 var global = ""
 
 open class A {
+    @JsName("foo")
     open fun foo(x: Int = 23) {
         global += "A.foo($x);"
     }

js/js.translator/testData/box/native/eval.kt

@@ -1,6 +1,4 @@
-// IGNORE_BACKEND: JS_IR
 // SKIP_MINIFICATION
-package foo
 
 val top = "TOP LEVEL"
 
@@ -11,7 +9,7 @@ fun box(): String {
 
     assertEquals(5, eval("3 + 2"))
 
-    val PACKAGE = "JS_TESTS.foo"
+    val PACKAGE = "JS_TESTS"
     assertEquals(top, eval("$PACKAGE.top"))
 
     return "OK"

js/js.translator/testData/box/native/print.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: JS_IR
+// KJS_WITH_FULL_RUNTIME
 // SKIP_MINIFICATION
 // This test uses eval
 // SKIP_NODE_JS