Support for multi-zones/fault domains in AKS-HCI

**Title**:

Support for multi-zones/fault domains in AKS-HCI

**Description**:

Some customers have requested the ability to deploy clusters on hardware that's distributed into hardware fault domains in order to increase survivability of workloads from hardware outages.

Similar concept as https://docs.microsoft.com/en-us/azure/aks/availability-zones

The issue names no files, tests, or entry points; begin by reviewing the AKS-HCI deployment and hardware fault-domain design context. Done would require an agreed implementation for distributing clusters across fault domains, along with documented validation criteria.

Written by the indexing model from the issue text.