Use waitForExecutionDone in lint errors test (#6070)

e2e/playwright/editor-tests.spec.ts

@@ -479,6 +479,7 @@ sketch_001 = startSketchOn(XY)
   test('if you write kcl with lint errors you get lints', async ({
     page,
     homePage,
+    scene,
   }) => {
     const u = await getUtils(page)
     await page.setBodyDimensions({ width: 1000, height: 500 })
@@ -498,10 +499,7 @@ sketch_001 = startSketchOn(XY)
     await page.keyboard.press('ArrowLeft')
     await page.keyboard.press('ArrowRight')
 
-    // FIXME: lsp errors do not propagate to the frontend until engine is connected and code is executed
-    // This timeout is to wait for engine connection. LSP and code execution errors should be handled differently
-    // LSP can emit errors as fast as it waits and show them in the editor
-    await page.waitForTimeout(10000)
+    await scene.waitForExecutionDone()
 
     // error in guter
     await expect(page.locator('.cm-lint-marker-info').first()).toBeVisible()