Tests: Disable Vite in tests

So that we don't have to have the dev server running, or have
built assets previously, before running tests.

tests/TestCase.php

@@ -9,4 +9,11 @@
 abstract class TestCase extends BaseTestCase
 {
     use CreatesApplication;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->withoutVite();
+    }
 }