capz should support UX for using workload identity in cloud provider azure

[sonasingh46]

/kind feature

Describe the solution you'd like
[A clear and concise description of what you want to happen.]
Workload identity support has gotten into cloud provider azure and capz should should be able to configure cloud config so that workload identity can be used in cloud provider azure.

Anything else you would like to add:
Umbrella Issue #2205

Environment:

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

[sonasingh46]

/assign sonasingh46

[mboersma]

/milestone next