[JS IR] Adapt stepping tests for Kotlin/JS

compiler/testData/debug/stepping/simpleInlineDefaultArg.kt

@@ -27,12 +27,15 @@ fun box(): String {
 // for the inline function are only used for instructions covered by
 // the `$i$f$alsoInline` variable life time.
 
-// EXPECTATIONS
+// EXPECTATIONS JVM JVM_IR
 // test.kt:10 box
 // test.kt:5 box
 // test.kt:3 box
 // EXPECTATIONS JVM_IR
 // test.kt:5 box
-// EXPECTATIONS
+// EXPECTATIONS JVM JVM_IR
 // test.kt:6 box
-// test.kt:10 box
+// test.kt:10 box
+
+// EXPECTATIONS JS_IR
+// test.kt:10 box