fix: ansible 2.19: calico resources final evaluation (#13503)

The bgp changes are a bit verbose, because I chose to reproduce the
exact semantics of the current code, so that the manifest handed to
calicoctl does not contain unset fields (instead of just using defaults
value).

It would be more readable to just accept default value in the
manifests, but might be a problem if there is other writer of the same
Calico resources.

roles/kubespray_defaults/defaults/main/main.yml

@@ -241,9 +241,6 @@ cilium_identity_allocation_mode: crd
 # https://docs.cilium.io/en/stable/concepts/networking/ipam/
 cilium_ipam_mode: cluster-pool
 
-# Determines if calico_rr group exists
-peer_with_calico_rr: "{{ 'calico_rr' in groups and groups['calico_rr'] | length > 0 }}"
-
 # Choose data store type for calico: "etcd" or "kdd" (kubernetes datastore)
 calico_datastore: "kdd"