Removes CultSoaTable, CultSoaColumn, CultCacheSoaStore, CultCacheSoaTypeTable,
CultCacheSoaMember, CultCache.Soa<T>, the _soa field and its four hooks, and
the two tests that exercised them (with their TransformEntry and
MeshManagedPlayer fixtures). The last working form is at
parked/cultcache-soa.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>