Fixes
- Check for empty values in fields that are required by Envoy for RateLimitActions. Previously invalid config would be passed to Envoy. API reference: https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/route/v3/route_components.proto#config-route-v3-ratelimit-action. (#8573)
- Added customInputResource unmarshalling logic to ValidatingAdmissionWebhook for RateLimitConfigs (#8042)