convert all ci jobs to use workload identity.

[sonasingh46]

/kind feature

Describe the solution you'd like
All the CI jobs in capz should start using workload identity.

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]
Umbrella Issue: #2205

Environment:

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

[sonasingh46]

/assign sonasingh46

[Jont828]

/milestone next

[k8s-ci-robot]

@Jont828: You must be a member of the kubernetes-sigs/cluster-api-provider-azure-maintainers GitHub team to set the milestone. If you believe you should be able to issue the /milestone command, please contact your Cluster API Provider Azure Maintainers and have them propose you as an additional delegate for this responsibility.

In response to this:

/milestone next

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[CecileRobertMichon]

/milestone next

[CecileRobertMichon]

We might want to wait for Azure/azure-workload-identity#1209 to do this work

/milestone next

[dtzar]

@jackfrancis - Isn't this already covered by #4763 ?

[jackfrancis]

Ya, good call