whitelist test failing terrains

[LyleSY]

Summary

Bugfixes "whitelist test failing terrains"

Purpose of change

Fix build

Describe the solution

Adds the ten terrains that most reliably kill the terrain build test, grabbed from this recent unrelated PR https://github.com/CleverRaven/Cataclysm-DDA/actions/runs/12602732715/job/35130919349?pr=78875

Describe alternatives you've considered

Just keep rerunning the test until it finally passes
Increase the spawn likelihood for all ten

Testing

N/A

Additional context

Following these instructions from the test failure output:
To resolve errors about missing terrains you can either give the terrain the
([slow] ~starting_items)=> SHOULD_NOT_SPAWN flag, intended for terrains that should never spawn, for
([slow] ~starting_items)=> example test terrains or work in progress, or tweak the constraints so that
([slow] ~starting_items)=> the terrain can spawn more reliably, or add them to the whitelist at /data/
([slow] ~starting_items)=> mods/TEST_DATA/overmap_terrain_coverage_test/
([slow] ~starting_items)=> overmap_terrain_coverage_whitelist.json intended for terrains that sometimes
([slow] ~starting_items)=> spawn, but cannot be expected to spawn reliably enough for this test.

[Maleclypse]

This might be the best solution possible for now but I’m waiting a few days to see if anyone comes up with anything better. The issue is that these locations are hard to place but if we whitelist them and then they become impossible to place will we ever know?

[LyleSY]

Right, to my knowledge we don't have a good way to test for never spawning, we can only test for not always spawning.