Prominent payload limit error and configurable URL length limit (#27747)

* Added context error handler for MaxBytesError

* Made URL length limit configurable

* Added tests

* Removed an unused function

* Typo

server/i18n/en.json

@@ -1785,6 +1785,10 @@
     "id": "api.context.remote_id_missing.app_error",
     "translation": "Secure connection ID missing."
   },
+  {
+    "id": "api.context.request_body_too_large.app_error",
+    "translation": "Unable to process request. Request body too large."
+  },
   {
     "id": "api.context.server_busy.app_error",
     "translation": "Server is busy, non-critical services are temporarily unavailable."
@@ -8762,6 +8766,10 @@
     "id": "model.config.is_valid.max_payload_size.app_error",
     "translation": "Invalid max payload size for service settings. Must be a whole number greater than zero."
   },
+  {
+    "id": "model.config.is_valid.max_url_length.app_error",
+    "translation": "Invalid max URL length for service settings. Must be a whole number greater than zero."
+  },
   {
     "id": "model.config.is_valid.max_users.app_error",
     "translation": "Invalid maximum users per team for team settings. Must be a positive number."