[K/Wasm] Introduce stepping tests for Wasm

compiler/testData/debug/stepping/throwException.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: WASM
 // FILE: test.kt
 fun box() {
     val a = 1
@@ -15,25 +16,25 @@ fun throwIfLess(a: Int, b: Int) {
         throw IllegalStateException()
 }
 // EXPECTATIONS JVM JVM_IR
-// test.kt:3 box
 // test.kt:4 box
 // test.kt:5 box
 // test.kt:6 box
-// test.kt:14 throwIfLess
-// test.kt:15 throwIfLess
 // test.kt:7 box
-// test.kt:8 box
-// test.kt:14 throwIfLess
 // test.kt:15 throwIfLess
+// test.kt:16 throwIfLess
+// test.kt:8 box
+// test.kt:9 box
+// test.kt:15 throwIfLess
+// test.kt:16 throwIfLess
 
 // EXPECTATIONS JS_IR
-// test.kt:3 box
 // test.kt:4 box
-// test.kt:6 box
-// test.kt:14 throwIfLess
+// test.kt:5 box
+// test.kt:7 box
 // test.kt:15 throwIfLess
-// test.kt:7 box
-// test.kt:7 box
+// test.kt:16 throwIfLess
 // test.kt:8 box
-// test.kt:14 throwIfLess
+// test.kt:8 box
+// test.kt:9 box
 // test.kt:15 throwIfLess
+// test.kt:16 throwIfLess