[MCPE-66353] Various translations refer to worlds as "level"

A handful of translations (mostly various error messages) refer to worlds as "level." This is outdated terminology and can be confusing for players who see "world" in most places, but "level" in a few random places.

The list

codeScreen.needCheats=Cheats must be enabled in the level to code!
commands.generic.disabled=Cheats aren't enabled in this level.
commands.time.disabled=Always Day is enabled in this level.
commands.weather.disabled=Weather Cycle isn't enabled in this level.
disconnectionScreen.editionMismatch=This level was saved from Minecraft: Education Edition. It cannot be loaded.
disconnectionScreen.futureVersion=A newer version of the game has saved this level. It cannot be loaded.
level.export.started=Level export started...
level.import.started=Level import started...
level.export.success=Level export finished successfully
level.import.success=Level import finished successfully
level.export.failed=Level export failed
level.import.failed=Level import failed
level.import.failed.incompatibleEdition=Level import failed: Unsupported file format