Minor fix to TMB unit caps.

Content:
Added unit cap boni to Tomb King pyramids and Nagashizaar. New context expressions give Arkhan different boni.
Added in Pyramid of Nagash and Nagashizaar effects, as they were missing.

Fixes:
Fixed a pair of effect scopes.

TODO:
Lazy fix for CHD labor income is still in place.

Experimental:
Added additional convoy effect to Chorf trade station. May or may not function due to being a technology effect.

General:
Removed legacy Skaven building effects.
Added DLC23 unit cap effects.
Added said effects to CHD landmarks.

Fixed DLC23 special port for CHD.
Slight rebalance of various DLC23 landmark effects.

Removed debug values from Chorf pastures.

Enabled a temporary fix for Chorf labor effects.

TO-DO:
Create a new pooled resource effect for this issue and apply it.