Postgres image update to new Bitnami repository (kptdev#322)

* update Postgres image used in local/development DB cache deployment

- previous image from https://hub.docker.com/r/bitnami/postgresql was
  removed in bitnami catalog restructuring

* change image to latest tag

* switch image to latest archived bitnamilegacy one

Author: JamesMcDermott

deployments/local/postgres/postgres-statefulset.yaml

@@ -66,7 +66,7 @@ spec:
       hostIPC: false
       containers:
         - name: postgresql
-          image: docker.io/bitnami/postgresql:17.5.0-debian-12-r4
+          image: docker.io/bitnamilegacy/postgresql:17.6.0-debian-12-r4
           imagePullPolicy: "IfNotPresent"
           securityContext:
             runAsUser: 1001