Forest biome terrain oter_id -> oter_type_id

[Procyonae]

Summary

None

Purpose of change

Remove needless extra region setting lines specifying that all rotations of maps should count for forest density.

Describe the solution

Removes useless rotated oter_id strings.
Replaces with just oter_type_id strings.
Alphabetises the lists for good measure.

Describe alternatives you've considered

Buying a separate mouse just to scroll with.
Adding om_terrain_match_type functionality.

Testing

Start a world and find a road going through forest.
Do the same after adding "road" to "forest_thick"'s "terrains".
Forest now goes up to the road.

Additional context

[github-actions]

Auto-requesting reviews from non-collaborators: @I-am-Erk @Light-Wave @Night-Pryanik

[akrieger]

So to test the crash, what I did is I moved cave_innawood out of the first slot for forest terrains, and the crash stopped happening even on the save that already had a cave generated. There's something funky that arrangement is exposing, but I can't take the time to look harder so I'm just monkeypatching the crash away.