MM-9547 Added config setting to control url autolinking schemes (#8862)

* MM-9547 Added config setting to control autolinking schemes

* Renamed AutolinkingSchemes to CustomUrlSchemes

i18n/en.json

@@ -4950,6 +4950,10 @@
     "id": "model.config.is_valid.data_retention.message_retention_days_too_low.app_error",
     "translation": "Message retention must be one day or longer."
   },
+  {
+    "id": "model.config.is_valid.display.custom_url_schemes.app_error",
+    "translation": "The custom URL scheme {{.Scheme}} is invalid. Custom URL schemes must start with a letter and contain only letters, numbers, plus (+), period (.), and hyphen (-)."
+  },
   {
     "id": "model.config.is_valid.elastic_search.aggregate_posts_after_days.app_error",
     "translation": "Elasticsearch AggregatePostsAfterDays setting must be a number greater than or equal to 1"