Revert "don't auto-target unarmed buildings in ra mod"

This reverts commit c74fa903053efd06a79ed4d4aaea53ecdb1f4161
also revert AutoTargetIgnore: for all buildings in cnc
also revert AutoTargetIgnore: for all buildings in d2k
Merge pull request #3467 from Mailaender/autotarget-bots

AutoTarget unarmed buildings again to help AI crush it's enemy