ci: enable ratelimiting via traefik

As a temporary measure, we've added ratelimiting on the gRPC endpoint
for pd, via Traefik middleware. We plan to add similar ratelimiting
functionality to pd itself, so that solo node operators can benefit from
limited DoS protection. For now, we add this so that a subsequent CI
deploy (e.g. #3784) doesn't remove the protection that's currently live.

deployments/charts/penumbra-node/values.yaml

@@ -86,7 +86,8 @@ ingressRoute:
   secretName: ""
   # Traefik middleware CRDs, to be applied to pd's gRPC service.
   # These config objects must already exist in the API, i.e. create them out of band.
-  middlewares: []
+  middlewares:
+    - name: ratelimit-pd
 
 # Whether to place the application in "maintenance mode", effectively stopping pd and cometbft,
 # allowing an administrator to inspect and munge local state, e.g. to perform a chain upgrade.