fix(e2e): set playwright-report to project root for drone upload step

e2e/plugin-e2e/playwright.config.ts

@@ -9,7 +9,7 @@ export default defineConfig<PluginOptions>({
   retries: process.env.CI ? 2 : 0,
   /* Opt out of parallel tests on CI. */
   workers: process.env.CI ? 1 : undefined,
-  reporter: 'html',
+  reporter: [['html', { outputFolder: '../../playwright-report' }]],
   use: {
     baseURL: `http://${process.env.HOST || 'localhost'}:${process.env.PORT || 3000}`,
     trace: 'retain-on-failure',