Add support for launching vSphere6.7u3 or 7 environments and provisioning clusters with TKG cli

[pacphi]

There's a number of great articles and tutorials. How could we codify the steps and drive and installation through the same interface of bash + Terraform delegating to appropriate tools?

For reference:

• https://tanzu.vmware.com/content/practitioners/a-closer-look-at-vmware-tanzu-kubernetes-grid-multitenant-setup?src=so_5a314d05e49f5&cid=70134000001SkJn
• https://theithollow.com/2020/04/06/deploying-tanzu-kubernetes-grid-management-clusters-vsphere/
• https://www.virtuallyghetto.com/2020/03/sneak-peak-at-deploying-tanzu-kubernetes-grid-plus-on-vsphere-vmware-cloud-on-aws.html