Add vpcCidr to default kubeAPI definition for alloy

When Alloy was migrated to bb-common in this MR I introduced a regression in the network policies, which broke the previously established pattern of adding networkPolicies.vpcCidr to existing KubeAPI egress network policies.

It should be adding both .Values.networkPolicies.controlPlaneCidr and .Values.networkPolicies.vpcCidr as seen in this snippet:

networkPolicies:
  enabled: {{ .Values.networkPolicies.enabled }}

  egress:
    definitions:
      kubeAPI:
        to:
          - ipBlock:
              cidr: {{ .Values.networkPolicies.controlPlaneCidr }}
          {{- if ne .Values.networkPolicies.vpcCidr "0.0.0.0/0" }}
          - ipBlock:
              cidr: {{ .Values.networkPolicies.vpcCidr }}
          {{- end }}