This patch is split off from D2885. It corrects the `simulation/ai/petra/config.js` file:
* Structure entries are alphabetized and placed on a new line each, to make things easier to maintain and review in the long run.
* Removed the rotary mill deprecated in D2668/rP23803.
* Exclude the royal stoa in anticipation of D2863.
* Add missing entries:
* `kush_pyramid_small.xml`
* `kush_temple_amun.xml`
* `rome_temple_vesta.xml`