[JS IR] Adapt stepping tests for Kotlin/JS

compiler/testData/debug/stepping/beforeGotoToWhileStart.kt

@@ -19,7 +19,7 @@ fun box() {
     foo()
 }
 
-// EXPECTATIONS
+// EXPECTATIONS JVM JVM_IR
 // test.kt:19 box
 // test.kt:11 foo
 // test.kt:12 foo
@@ -34,3 +34,15 @@ fun box() {
 // test.kt:13 foo
 // test.kt:16 foo
 // test.kt:20 box
+
+// EXPECTATIONS JS_IR
+// test.kt:19 box
+// test.kt:12 foo
+// test.kt:6 alternate
+// test.kt:7 alternate
+// test.kt:7 alternate
+// test.kt:12 foo
+// test.kt:6 alternate
+// test.kt:7 alternate
+// test.kt:7 alternate
+// test.kt:13 foo