chore: add mock for extensions meta endpoint (#7073)

Author: khendrikse

tests/integration/utils/mock-api.js

@@ -44,6 +44,12 @@ export const startMockApi = ({ routes, silent }) => {
     res.json({ site_id: 'site_id', integrations: [] })
   })
 
+  app.get('/team/team_id/integrations/installations/meta/site_id', function onRequest(req, res) {
+    addRequest(requests, req)
+    res.status(200)
+    res.json({ site_id: 'site_id', integrations: [] })
+  })
+
   app.all('*', function onRequest(req, res) {
     addRequest(requests, req)
     if (!silent) {