Provide Calico CNI Dual Stack Support

[eak13]

As an operator, I may need to provide dual stack support for my container interface environment so both IPV4 & IPV6 addresses can be supported.

Some information on Calico Dual Stack support.
https://www.tigera.io/blog/dual-stack-operation-with-calico-on-kubernetes/
https://docs.projectcalico.org/networking/ipv6

This will ultimately be included in the network-cloud type defined in #98, but this issue should focus on making the necessary changes & overrides to the existing Calico deployment to enable dual stack support.

[lb4368]

Blocked by #26

[drewwalters96]

Depends on airshipit/airshipctl#166. More discussion required on whether or not this should be included in the type defined by #28.

[SaurabhArora86]

please assign it to me, as discussed me and @sanjib-35 would be working on it

[eak13]

@SaurabhArora86 I've updated the issue per our email exchange. @sanjib-35 please comment in the issue so I can assign you as well. Thanks.

[sanjib-35]

Please assign it to me too

[eak13]

This will have a dependency on airshipit/airshipctl#589 for the k8s v1.21 upgrade to enable dual stack support.

[manojkva]

Please assign this to me. I hope i could test it with feature-gate set locally until dependencies are closed.

[manojkva]

Working PS available @ https://review.opendev.org/c/airship/treasuremap/+/807721

Testing on Kind cluster on a local link IPV6 node : https://hackmd.io/Avare0IAQribdsl_am75lQ

[manojkva]

PS available @ https://review.opendev.org/c/airship/treasuremap/+/807721
Working Test demo : https://review.opendev.org/c/airship/airshipctl/+/810449
I have used AIAP with a private IPv6 network to demonstrate a dualstack setup using airship.

Hackmd : https://hackmd.io/OTWXJ0fSTTak_Zt33lilww?view