Add E2E smoke test (#1962)

creates a smoke test for the zabbix data source

closes https://github.com/grafana/data-sources/issues/194

tests/e2e/smoke.test.ts

@@ -0,0 +1,8 @@
+import { test, expect } from '@grafana/plugin-e2e';
+
+test('Smoke test: plugin loads', async ({ createDataSourceConfigPage, page }) => {
+  await createDataSourceConfigPage({ type: 'alexanderzobnin-zabbix-datasource' });
+
+  await expect(await page.getByText('Type: Zabbix', { exact: true })).toBeVisible();
+  await expect(await page.getByRole('heading', { name: 'Connection', exact: true })).toBeVisible();
+});