WIP - TELCODOCS-328 - Adding new VIP install params for IPv4 and IPv6

[rohennes]

TELCODOCS-328: Ingress VIP and API VIP currently support IPv4 address only. With this update, IPv6 addresses are also supported.

Version(s): 4.12+

Issue: https://issues.redhat.com/browse/TELCODOCS-328

Link to docs preview:

1. Updated install config code and added note: http://file.emea.redhat.com/rohennes/TELCODOCS-328-dual-vips/installing/installing_bare_metal_ipi/ipi-install-installation-workflow.html#configuring-the-install-config-file_ipi-install-installation-workflow
2. Updated apiVIPs/IngressVIPs parameter definition and added a note in each definition: http://file.emea.redhat.com/rohennes/TELCODOCS-328-dual-vips/installing/installing_bare_metal_ipi/ipi-install-installation-workflow.html#additional-install-config-parameters_ipi-install-installation-workflow
3. Updated dual-stack networking section: http://file.emea.redhat.com/rohennes/TELCODOCS-328-dual-vips/installing/installing_bare_metal_ipi/ipi-install-installation-workflow.html#modifying-install-config-for-dual-stack-network_ipi-install-installation-workflow
4. Updated yaml code to match new params in this section: http://file.emea.redhat.com/rohennes/TELCODOCS-328-dual-vips/installing/installing_bare_metal_ipi/ipi-install-installation-workflow.html#modifying-install-config-for-no-provisioning-network_ipi-install-installation-workflow

QE review:

• [ ] QE has approved this change.

[ocpdocs-previewbot]

🤖 Updated build preview is available at: https://51135--docspreview.netlify.app

Build log: https://circleci.com/gh/ocpdocs-previewbot/openshift-docs/4140

[cybertron]

/lgtm

All of the ip version requirements look good now, thanks!

[openshift-ci[bot]]

New changes are detected. LGTM label has been removed.

[eldar101]

Other than a small comment above, /lgtm.

[rohennes]

/label telco /label peer-review-needed

[abhatt-rh]

/label peer-review-in-progress

[rohennes]

/label merge-review-needed

[EricPonvelle]

/cherrypick enterprise-4.12

[openshift-cherrypick-robot]

@EricPonvelle: new pull request created: #53215

In response to this:

/cherrypick enterprise-4.12

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