CI: Flux envionments failing

Summary

The "flux" envionments currently fail because of an issue with Envoy:

PostgreSQL deployment detected

level=WARN msg="upgrade failed" name=gkevc-135-55ba1001-mouz40 error="failed to create resource: failed to create typed patch object (default/gkevc-135-55ba1001-mouz40-policy; gateway.envoyproxy.io/v1alpha1, Kind=EnvoyPatchPolicy): .spec.targetRef.namespace: field not declared in schema"

Error: UPGRADE FAILED: failed to create resource: failed to create typed patch object (default/gkevc-135-55ba1001-mouz40-policy; gateway.envoyproxy.io/v1alpha1, Kind=EnvoyPatchPolicy): .spec.targetRef.namespace: field not declared in schema

Example pipeline: https://gitlab.com/gitlab-org/charts/gitlab/-/pipelines/2304436931

The fix is currently WiP in !4778 (merged)