[openaddresses] adding Grodno oblast, Belarus

resources/parser/data_sets/openaddresses.yaml

@@ -304,6 +304,13 @@ countries:
 
     by:
         subdirs:
+            grodno:
+                add:
+                    state: Гродненская область
+                files:
+                    - filename: regionwide.csv
+                      fields: *fields_with_unit
+                      non_numeric_units: true
             mogilev:
                 add:
                     state: Могилёвская область