Fix test data for wasm-compatibility

- Playwright expect `json` filed in mock data

Author: ilgonmic

tests/wasm-compatibility.e2e.ts

@@ -16,12 +16,16 @@ const JS_1_9 = Object.freeze({
   jsCode: makeJSPrintCode('Hello, world!'),
   errors: { 'File.kt': [] },
   exception: null,
-  text: '<outStream>Hello, world!\n</outStream>',
+  text: '',
 });
 
 const OUTPUTS = Object.freeze({
-  'js-ir': JS_1_9,
-  wasm: WASM_1_9,
+  'js-ir': {
+    json: JS_1_9,
+  },
+  wasm: {
+    json: WASM_1_9,
+  },
 });
 
 test.describe('WASM platform with `moduleId` in output', () => {