Support multi-az on vSphere: Deploy workload cluster on multiple AZs in vSphere

[saji-pivotal]

Describe the feature request
The request is to support deploying workload clusters across different ComputeClusters on vSphere or across different hosts within the same ComputeCluster. This can be done by using VsphereFailureDomain and VsphereDeploymentZone resources.

The support for this has already been provided upstream - https://github.com/kubernetes-sigs/cluster-api-provider-vsphere/releases/tag/v0.7.10

#791 has also been filed for the Tanzu CLI to perform CRUD operations on VsphereFailureDomain and VsphereDeploymentZone resources.

The request in this issue is -

1. If a management cluster has a VsphereFailureDomain, plug the name of the VsphereFailureDomain in the workload cluster template while deploying it.
2. This will require changes to the provider templates, and some adding config variables to determine where to deploy the workload cluster

Describe alternatives you've considered

Affected product area (please put an X in all that apply)

• APIs
• Addons
• CLI
• Docs
• Installation
• Plugin
• Security
• Test and Release
• User Experience

Additional context
#825
https://github.com/kubernetes-sigs/cluster-api-provider-vsphere/releases/tag/v0.7.10

[saji-pivotal]

I was able to create a VsphereFailureDomain, and an associated VsphereDeploymentZone. But when I try to create a prod workload cluster (using a photon ova), only 1 of the 3 desired worker nodes gets deployed.

Attaching the kubectl logs
vsphere-wc-1026.log

@srm09 Is this something you've encountered in your testing?