Parametrize all walls: Part 2

[Milopetilo]

Summary

None

Purpose of change

Continue on from #77459.
Also closes #77676

Describe the solution

Change the palettes and symbols in mapgen.

Describe alternatives you've considered

Testing

Game loads, walking through town most things seem as they should be.

Additional context

This part contains names starting with h-p.
There might be some mismatching walls in places that sometimes use palettes, such as office towers, since I haven't changed those yet.
Draft until #77583 is merged

[Maleclypse]

I have concerns. Should office towers be using parametrized walls or skyscrapers? Do they now include adobe walls? Are these external walls or internal only? What am I missing here?

[Milopetilo]

You're right, I should've maybe put a bit more thought into what all the walls could turn into. I'll draft this for now while I address this.