CLD-5835 - Do not use the mattermost-build-webapp image from ECR (#23748)

* Only use mattermostdevelopment images
* Fix docker mirroring workflow
* Reenable insights feature for E2E tests

server/scripts/mirror-docker-images.json

@@ -32,5 +32,9 @@
   },
   "golang": {
     "1.19.5": "golang:1.19.5@sha256:bb9811fad43a7d6fd2173248d8331b2dcf5ac9af20976b1937ecd214c5b8c383"
+  },
+  "node": {
+    "16.10.0": "node:16.10.0",
+    "16.17.0": "node:16.17.0"
   }
 }