Test to ensure unconditional and conditional nest placement works

[Procyonae]

Summary

None

Purpose of change

Prevent a repeat of #67197

Describe the solution

The test checks each conditional placement method with both a condition that should resolve true and another that should resolve false, as well as an unconditional nest with an else_chunks for it's false test
Checks that om_terrain_match_type works in neighbors
Checks that if multiple conditions are used all must be true

Describe alternatives you've considered

Adding this sooner
Giving each nest an else_chunk with a false terrain so you have true/false/unplaced as opposed to placed/unplaced

Testing

Ran 550 times locally with no fails
(Running it 500 times on my not particularly powerful PC only took 27.88s, I love how fast code can be)

Additional context

[I-am-Erk]

A new test! Nice! Heroic work.