[K/Wasm] Introduce stepping tests for Wasm

compiler/testData/debug/stepping/assertion.kt

@@ -1,4 +1,5 @@
 // IGNORE_INLINER: IR
+// IGNORE_BACKEND: WASM
 // FILE: test.kt
 
 public val MASSERTIONS_ENABLED: Boolean = true
@@ -31,23 +32,23 @@ fun box(): String {
 }
 
 // EXPECTATIONS JVM JVM_IR
-// test.kt:25 box
-// test.kt:16 box
-// test.kt:17 box
-// test.kt:4 getMASSERTIONS_ENABLED
+// test.kt:26 box
 // test.kt:17 box
 // test.kt:18 box
-// test.kt:22 box
-// test.kt:26 box
-// test.kt:7 box
-// test.kt:4 getMASSERTIONS_ENABLED
-// test.kt:7 box
+// test.kt:5 getMASSERTIONS_ENABLED
+// test.kt:18 box
+// test.kt:19 box
+// test.kt:23 box
+// test.kt:27 box
 // test.kt:8 box
-// test.kt:13 box
-// test.kt:30 box
+// test.kt:5 getMASSERTIONS_ENABLED
+// test.kt:8 box
+// test.kt:9 box
+// test.kt:14 box
+// test.kt:31 box
 
 // EXPECTATIONS JS_IR
-// test.kt:16 box
 // test.kt:17 box
-// test.kt:7 box
-// test.kt:30 box
+// test.kt:18 box
+// test.kt:8 box
+// test.kt:31 box