MM-54640 Add API to get multiple emojis by name at once (#24651)

* MM-54640 Add API to get multiple emojis by name at once

* Fix status code when too many names are requested

* Address feedback

* Update unit tests

* Fix styling

* Fix more styling

* Fix mismatched i18n id

server/i18n/en.json

@@ -1796,6 +1796,10 @@
     "id": "api.emoji.get_image.read.app_error",
     "translation": "Unable to read image file for emoji."
   },
+  {
+    "id": "api.emoji.get_multiple_by_name_too_many.request_error",
+    "translation": "Unable to get that many emojis by name. Only {{.MaxNames}} emojis can be requested at once."
+  },
   {
     "id": "api.emoji.storage.app_error",
     "translation": "File storage not configured properly. Please configure for either S3 or local server file storage."