Enabling the support for the NodeAutoprovisioning

[krs123sharma1]

/kind feature

Describe the solution you'd like
Enabling the support for the AKS NodeAutoprovisioning feature

Anything else you would like to add:
N?A

Environment:

• cluster-api-provider-azure version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

[jackfrancis]

The plans are for this to be exposed in a new AKS API via ASO starting with ASO version v1.16.0.

cc @nojnhuh @mboersma @matthchr

Once that version of ASO is published, we can take a dependency upon it in CAPZ and build AKS clusters w/ NAP enabled.

[jackfrancis]

/assign @nojnhuh @mboersma