Is your feature request related to a problem? Please describe.
Reduce cross-AZ traffic as it is very expensive on hyperscalers (e.g. AWS - https://aws.amazon.com/blogs/architecture/overview-of-data-transfer-costs-for-common-architectures/)

Describe the solution you'd like
Kubernetes has the trafficDistribution parameter for Services (https://kubernetes.io/docs/concepts/services-networking/service/#traffic-distribution) allowing to e.g. set PreferClose so that connections use pods in the same zone or even the same node rather avoiding expensive cross availability zone traffic.

Describe alternatives you've considered

Additional context
A similar idea was brought forward for Grafana Mimir in grafana/mimir#10214 and was implemented via grafana/mimir#12243 already.