[sql, lua, cpp] Moves min/max levels to mob_spawn_points sql

[Frankie-hz]

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What does this pull request do?

Moves min/max levels from mob_groups.sql to mob_spawn_points.sql. Added Valkurm Dunes level changes as an example.

This will break all current DEs implemented without levels defined

Reason for this PR is because as we are doing mob level audits for every single zone there are 1-3 different level ranges for each type of mob. It looks like when the mob_groups was designed they were unaware that mob levels worked like this. Setting them to the mob_spawn_points allows us to differentiate the levels and not add 30-40 rows to each mob_group tables in the sql.

Steps to test these changes

Go to any mob in the game and check their levels.

To check DEs you can edit the fafnir.lua script.
If you remove the minLevel and maxLevel you will get an error with defaulted level to 255

[github-actions]

✨ Hello and thanks for the PR! ✨

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[Xaver-DaRed]

YOLO