Merge pull request #629 from citizensadvice/enable-cookie-engine-in-dev

chore: Enable FF_NEW_COOKIE_MANAGEMENT in dev envs

Author: KPobeeNorris

infrastructure/app/stages/dev.yaml

@@ -20,3 +20,4 @@ envVars:
   RAILS_ENV: production
   USE_TEST_SUPPLIERS: ${{ vars.USE_TEST_SUPPLIERS }}
   FF_SMALL_SUPPLIER_STARS: ${{ vars.FF_SMALL_SUPPLIER_STARS }}
+  FF_NEW_COOKIE_MANAGEMENT: ${{ vars.FF_NEW_COOKIE_MANAGEMENT }}