[MM-16768] Add support for Elasticsearch v7 (#12537)

* [MM-16768] Add support for Elasticsearch v7

* Fix i18n

* Adds external services tracking to the telemetry

* Rebuild elasticsearch interface mock

* Rename diagnostics keys

* Fix merge change

i18n/en.json

@@ -3922,6 +3922,14 @@
     "id": "ent.elasticsearch.start.create_bulk_processor_failed.app_error",
     "translation": "Failed to create Elasticsearch bulk processor"
   },
+  {
+    "id": "ent.elasticsearch.start.get_server_version.app_error",
+    "translation": "Failed to get Elasticsearch server version"
+  },
+  {
+    "id": "ent.elasticsearch.start.parse_server_version.app_error",
+    "translation": "Failed to parse Elasticsearch server version"
+  },
   {
     "id": "ent.elasticsearch.start.start_bulk_processor_failed.app_error",
     "translation": "Failed to start Elasticsearch bulk processor"