fix: remove static volumeNames for GCP migration, fix redis image tag

Dynamic PVC provisioning needed on new GCP instance.
Redis image 7.4.3-debian-12-r0 was removed from Docker Hub;
use floating 7.4-debian-12 tag instead.

servers/legion/k8s/packages/pvc.yaml

@@ -6,7 +6,6 @@ metadata:
   namespace: packages
 spec:
   storageClassName: local-path
-  volumeName: pvc-3eb09a5d-3e2f-4d5e-a5ca-9e0a11d03795
   accessModes:
     - ReadWriteOnce
   resources:
@@ -20,7 +19,6 @@ metadata:
   namespace: packages
 spec:
   storageClassName: local-path
-  volumeName: pvc-4685c41f-5936-459f-a468-09d775296e5d
   accessModes:
     - ReadWriteOnce
   resources: