[MCM-1900] Exporting worlds from realms breaks permission levels

The priority should be Blocker, but wasn't a given option in the dropdown.

When exporting worlds from realms, the permission level required changes so some commands that normally can't be run on realms can no longer be run in the local world.

Tested Versions:

I don't know if it has ever worked, but I have been experiencing this through all 1.21 versions. Now currently on 1.21.51 Windows PC

Tested Commands:

/reload (and /reload all)

/setmaxplayers

Error:

When running these commands you get a "Incorrect permission level for command:COMMAND" error, even at OP level.

Impact:

This is effecting/blocking development, as we use realms to work together, and then download the final build, in our current project we can no longer set the max players

Steps to reproduce:

Create world
Run /setmaxplayers NUMBER - confirm working
Upload world to realm
Download world from realm
Run /setmaxplayers NUMBER - confirm error

Expected results:

For worlds to behave as normal after downloading the world from a realm and the permission level required for running these commands reset back to 2