Add support for Windows IPAM

[cPu1]

Description

This changelist adds support for Windows IPAM for new clusters.

EKS will eliminate the need to install the VPC controller on worker nodes to run Windows clusters for new clusters. For existing clusters, this functionality will be available later. When it's out, eksctl will

1. Add a new flag --delete to eksctl utils install-vpc-controllers to allow deleting an existing installation of VPC controller
2. Automatically patch the ConfigMap to enable Windows IPAM support when a Windows nodegroup is created

Partially addresses #2401

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the userdocs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes
• (Core team) Added labels for change area (e.g. area/nodegroup) and kind (e.g. kind/improvement)

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[cPu1]

I can confirm this feature is live. I'm going to merge after the integration test passes.

[cPu1]

Integration test passed.