[NFV] Added IPV6 scenarios for NFV

[mnietoji]

[multiple] Added IPv6 scenarios for NFV with OVS-DPDK and SR-IOV

Added two new IPv6 deployment scenarios:
* OVS-DPDK SR-IOV with 1 nodeset (va-nfv-ovs-dpdk-sriov-ipv6.yml)
* OVS-DPDK SR-IOV with 2 nodesets (dt-nfv-ovs-dpdk-sriov-ipv6-2nodesets.yml)

[ci_gen_kustomize_values] Added IPv6 nodeset templates
  * Added edpm-nodeset-values template with IPv6 configuration
  * Added edpm-nodeset2-values template for dual nodeset deployments
  * Updated common network-values template for IPv6 support

[libvirt_manager] Fixed IPv6 address formatting
  * Updated generate_networking_data.yml to properly handle IPv6 addresses
  * Prevented bracket corruption when IPv6 addresses are embedded in YAML

Signed-off-by: Miguel Angel Nieto Jimenez <mnietoji@redhat.com>

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✔️ openstack-k8s-operators-content-provider SUCCESS in 1h 43m 40s
✔️ podified-multinode-edpm-deployment-crc SUCCESS in 1h 23m 53s
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✔️ cifmw-molecule-ci_gen_kustomize_values SUCCESS in 5m 44s
✔️ cifmw-molecule-libvirt_manager SUCCESS in 39m 07s
✔️ cifmw-molecule-reproducer SUCCESS in 15m 34s

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✔️ openstack-k8s-operators-content-provider SUCCESS in 1h 43m 44s
❌ podified-multinode-edpm-deployment-crc RETRY_LIMIT in 9m 07s
✔️ cifmw-crc-podified-edpm-baremetal SUCCESS in 1h 28m 21s
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✔️ noop SUCCESS in 0s
✔️ cifmw-pod-ansible-test SUCCESS in 8m 29s
✔️ cifmw-pod-k8s-snippets-source SUCCESS in 4m 22s
✔️ cifmw-pod-pre-commit SUCCESS in 7m 44s
✔️ cifmw-architecture-validate-hci SUCCESS in 4m 16s
✔️ build-push-container-cifmw-client SUCCESS in 19m 28s
✔️ cifmw-molecule-ci_gen_kustomize_values SUCCESS in 5m 37s
✔️ cifmw-molecule-dnsmasq SUCCESS in 4m 50s
✔️ cifmw-molecule-libvirt_manager SUCCESS in 39m 39s
✔️ cifmw-molecule-nat64_appliance SUCCESS in 15m 55s
✔️ cifmw-molecule-reproducer SUCCESS in 15m 37s

[mnietoji]

recheck

[evallesp]

LGTM in general. Agree with @hjensas suggestion

Addressed in #3545