Backport of Add redirects for mesh-gateway docs into release/1.16.x (#…

…18380)

backport of commit bdf6ed9

Co-authored-by: Tu Nguyen <im2nguyen@users.noreply.github.com>

website/redirects.js

@@ -66,4 +66,11 @@ module.exports = [
       '/consul/docs/dynamic-app-config/kv#using-sentinel-to-apply-policies-for-consul-kv',
     permanent: true,
   },
+  {
+    source:
+      '/consul/docs/connect/gateways/mesh-gateway/service-to-service-traffic-datacenters',
+    destination:
+      '/consul/docs/k8s/deployment-configurations/multi-cluster',
+    permanent: true,
+  }
 ]