[18.0-fr1] Add osasinfra-ipv6 network-values template

[openshift-cherrypick-robot]

This is an automated cherry-pick of #2481

/assign rlobillo

[openshift-ci]

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[github-actions]

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[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
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https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/52bf9b32b8f54b93a0a3f15d176fec99

✔️ openstack-k8s-operators-content-provider SUCCESS in 1h 42m 58s
❌ podified-multinode-edpm-deployment-crc RETRY_LIMIT in 5m 52s
✔️ cifmw-crc-podified-edpm-baremetal SUCCESS in 1h 29m 57s
✔️ noop SUCCESS in 0s
✔️ cifmw-pod-ansible-test SUCCESS in 7m 32s
✔️ cifmw-pod-k8s-snippets-source SUCCESS in 4m 41s
✔️ cifmw-pod-pre-commit SUCCESS in 7m 23s
✔️ cifmw-architecture-validate-hci SUCCESS in 5m 02s
✔️ build-push-container-cifmw-client SUCCESS in 22m 33s
✔️ cifmw-molecule-ci_gen_kustomize_values SUCCESS in 6m 04s

[pablintino]

recheck