Improves notify props validation (#24031)

* Adds the channel member notify props max runes restriction

* Fix translations

server/i18n/en.json

@@ -4887,6 +4887,14 @@
     "id": "app.channel.update_last_viewed_at_post.app_error",
     "translation": "Unable to mark channel as unread."
   },
+  {
+    "id": "app.channel.update_member.app_error",
+    "translation": "Unable to update the channel member."
+  },
+  {
+    "id": "app.channel.update_member.notify_props_limit_exceeded.app_error",
+    "translation": "Unable to update the channel member, notify props size limit exceeded."
+  },
   {
     "id": "app.channel.user_belongs_to_channels.app_error",
     "translation": "Unable to determine if the user belongs to a list of channels."
@@ -8223,6 +8231,10 @@
     "id": "model.channel_member.is_valid.notify_level.app_error",
     "translation": "Invalid notify level."
   },
+  {
+    "id": "model.channel_member.is_valid.notify_props.app_error",
+    "translation": "Notify props size limit exceeded."
+  },
   {
     "id": "model.channel_member.is_valid.push_level.app_error",
     "translation": "Invalid push notification level."