Swap key item models

[lahm86]

Suggestion from JimmyBeon - https://discord.com/channels/871134175963545641/871138534436786257/871724267291672617

Investigate the possibility of swapping key items between levels, so for example Maria Doria may have 3 Prayer Wheels, and Barkhang 5 Circuit Breakers and 2 Gong Hammers.

The pickups and inventory models shouldn't be an issue, but the key/puzzle/quest indices will need to match what the level is setup for. Investigate the best approach for the keyholes/slots as it may be needed to retain the original slots if changing the room/wall positioning is not feasible. So Lara may have to effectively force a Prayer Wheel to fit a Circuit Breaker slot, for example.