Automate kind + workload identity

[jackfrancis]

⚠️ Cluster API Azure maintainers can ask to turn an issue-proposal into a CAEP when necessary. This is to be expected for large changes that impact multiple components, breaking changes, or new large features.

Goals

1. Goal 1
2. Goal 2

Non-Goals/Future Work

1. Non-Goal 1
2. Non-Goal 2

User Story

As a developer of CAPZ I would like to automatically use workload identity for all my feature work.

Detailed Description

[A clear and concise description of what you want to happen.]

Contract changes [optional]

[Describe contract changes between Cluster API Azure Provider controllers, if applicable.]

Data model changes [optional]

[Describe contract changes between Cluster API Azure Provider controllers, if applicable.]

/kind proposal