[K/Wasm] Unmute most of the stepping tests for Wasm in K1

compiler/testData/debug/stepping/whenMultiLineSubject.kt

@@ -1,4 +1,4 @@
-// IGNORE_BACKEND: WASM
+
 // FILE: test.kt
 
 fun foo(x: Int): Int {
@@ -73,3 +73,18 @@ fun box() {
 // test.kt:20 foo
 // test.kt:23 foo
 // test.kt:30 box
+
+// EXPECTATIONS WASM
+// test.kt:1 $box
+// test.kt:27 $box (8, 4, 4)
+// test.kt:5 $foo (10, 10, 10)
+// test.kt:6 $foo (8, 8, 8)
+// test.kt:14 $foo (18, 18, 18)
+// test.kt:15 $foo (8, 8, 8)
+// test.kt:16 $foo
+// test.kt:23 $foo (11, 4, 11, 4, 11, 4)
+// test.kt:28 $box (8, 4, 4)
+// test.kt:18 $foo
+// test.kt:29 $box (8, 4, 4)
+// test.kt:20 $foo
+// test.kt:30 $box