Overhaul map memory cache for tiles.

[kevingranade]

Summary

SUMMARY: None

Purpose of change

Fixes #36367
The cache in front of map memory never worked correctly, but due to another error that was fixed in #36338 this error was hidden. Essentially tiles, unlike curses, draws one map element at a time, and the cache for map memory was therefore being invoked multiple times. As a result of the cache being fixed, the first map element drawn would "win" instead of the final rendered tile being stored.

Describe the solution

Refrain from toggling the cache in the individual draw methods and instead only toggle it once all of the draw methods have been invoked.

Describe alternatives you've considered

In #36381 the whole map memory system is being overhauled, but I don't want to do something so invasive before 0.E.

Testing

Wander around and observe that furniture, vehicle parts and traps are drawn in map memory in addition to terrain.