fix(dependencies): address PR review findings

- Read the MetalLB speaker tag check from the managed host with slurp
  instead of a controller-side file lookup, and match the full image
  reference
- Restore the tigera-operator namespace on the Calico operator Deployment
  wait while keeping the managed CRD waits cluster-scoped
- Make Molecule verify inputs durable and scenario-specific via a
  per-scenario verify-vars.yml, driven by explicit verify_cni/verify_lb
  values instead of non-persisted converge facts
- Rename the kube-vip multi-peer BGP env var from bgppeers to bgp_peers
  and vip_cidr to vip_subnet so v1.2.2 actually reads them
- Map the legacy Cilium routed mode to tunnel and stop passing the alias
  directly to the chart
- Use return-code based failed_when on apply and preflight commands so
  non-error failures are no longer treated as success
- Clarify the sequential K3s upgrade path and backups in the README
- Add kube-vip and MetalLB regression tests and a Cilium mode mapping unit

roles/k3s_server/templates/vip.yaml.j2

@@ -36,7 +36,7 @@ spec:
         - name: vip_interface
           value: {{ kube_vip_iface }}
 {% endif %}
-        - name: vip_cidr
+        - name: vip_subnet
           value: "{{ apiserver_endpoint | ansible.utils.ipsubnet | ansible.utils.ipaddr('prefix') }}"
         - name: cp_enable
           value: "true"
@@ -62,7 +62,7 @@ spec:
           value: "{{ kube_vip_bgp_routerid }}"
 {% endif %}
 {% if _kube_vip_bgp_peers | length > 0 %}
-        - name: bgppeers
+        - name: bgp_peers
           value: "{{ _kube_vip_bgp_peers | map(attribute='peer_address') | zip(_kube_vip_bgp_peers | map(attribute='peer_asn')) | map('join', ':') | join(',') }}"  # yamllint disable-line rule:line-length
 {% else %}
 {% if kube_vip_bgp_as is defined %}