Localize state names (#5744)

* Localize state names in js-helper

* localize statename in address-confirm

* add localized state_name to AbstractPosition and AttendeeProfile

* use state_for_address in order export

src/pretix/base/models/customers.py

@@ -349,7 +349,7 @@ class AttendeeProfile(models.Model):
     def state_name(self):
         sd = pycountry.subdivisions.get(code='{}-{}'.format(self.country, self.state))
         if sd:
-            return sd.name
+            return _(sd.name)
         return self.state
 
     @property