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

compiler/testData/debug/stepping/whenIsChecks.kt

@@ -1,4 +1,4 @@
-// IGNORE_BACKEND: WASM
+
 // FILE: test.kt
 
 fun foo(x: Any) {
@@ -46,3 +46,14 @@ fun box() {
 // test.kt:18 box
 // test.kt:13 foo
 // test.kt:19 box
+
+// EXPECTATIONS WASM
+// test.kt:1 $box
+// test.kt:16 $box (8, 8, 8, 8, 4)
+// test.kt:5 $foo (10, 10, 10)
+// test.kt:6 $foo (8, 8, 8)
+// test.kt:13 $foo (1, 1, 1)
+// test.kt:17 $box (8, 8, 8, 8, 4)
+// test.kt:8 $foo (8, 8)
+// test.kt:18 $box (8, 8, 8, 8, 4)
+// test.kt:19 $box