Rename the Female identity class to FemaleCitizen, because it is intended for female support units only.
Thus prevent template editors from adding that tag to female military units and
allow modders to add a Female class for wider purposes.
Remove the FemaleCitizen training restriction category that was added for debug purposes but forgotton to be removed in rP12832.
Differential Revision: https://code.wildfiregames.com/D244
Reviewed By: fatherbushido
Refs: #1432 #4490