feat(forms): gate Form A production embedding

www/src/components/pages/ContactPage.astro

@@ -19,6 +19,7 @@ const formAIframe = resolveFormAIframe({
   rawMode: import.meta.env.PUBLIC_AIA_FORMS_MODE,
   liveApproved: import.meta.env.PUBLIC_AIA_FORMS_LIVE_APPROVED,
   isolatedTestApproved: import.meta.env.PUBLIC_AIA_FORMS_ISOLATED_TEST_APPROVED,
+  productionApproved: import.meta.env.PUBLIC_AIA_FORM_A_PRODUCTION_APPROVED,
   environmentRole: import.meta.env.PUBLIC_AIA_FORMS_ENVIRONMENT,
   allowIndexing: import.meta.env.PUBLIC_ALLOW_INDEXING,
   route,