MM-53962: Adding ES8 dependency (#24399)

* Adding ES8 dependency

```release-note
NONE
```


Co-authored-by: Mattermost Build <build@mattermost.com>

server/i18n/en.json

@@ -7442,10 +7442,6 @@
     "id": "ent.elasticsearch.aggregator_worker.index_job_failed.error",
     "translation": "Elasticsearch aggregator worker failed due to the indexing job failing"
   },
-  {
-    "id": "ent.elasticsearch.create_client.ca_cert_malformed",
-    "translation": "Decoding of the CA for Elasticsearch failed"
-  },
   {
     "id": "ent.elasticsearch.create_client.ca_cert_missing",
     "translation": "Could not open the CA file for Elasticsearch"
@@ -7650,10 +7646,6 @@
     "id": "ent.elasticsearch.search_users.unmarshall_user_failed",
     "translation": "Failed to decode search results"
   },
-  {
-    "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."
@@ -7662,10 +7654,6 @@
     "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."
-  },
   {
     "id": "ent.elasticsearch.stop.already_stopped.app_error",
     "translation": "Elasticsearch is already stopped."
@@ -8618,6 +8606,10 @@
     "id": "model.config.is_valid.elastic_search.ignored_indexes_dash_prefix.app_error",
     "translation": "Ignored indexes for purge should not start with dash."
   },
+  {
+    "id": "model.config.is_valid.elastic_search.invalid_backend.app_error",
+    "translation": "Invalid search backend. Must be either elasticsearch or opensearch."
+  },
   {
     "id": "model.config.is_valid.elastic_search.live_indexing_batch_size.app_error",
     "translation": "Elasticsearch Live Indexing Batch Size must be at least 1."