add opendata boolean attribute for procedure

when opendata is set to true, it means that descriptive's procedure can be
public
when opendata is set to false, ti means that descriptive's can not be
public, because the procedure is only available for public servants, not
citizens.

db/migrate/20220622183305_backfill_add_opendata_to_procedures.rb

@@ -0,0 +1,10 @@
+class BackfillAddOpendataToProcedures < ActiveRecord::Migration[6.1]
+  disable_ddl_transaction!
+
+  def change
+    Procedure.in_batches do |relation|
+      relation.update_all opendata: true
+      sleep(0.01)
+    end
+  end
+end