🐛 Add update permission for AWSMachinePool finalizers as needed by OwnerReferencesPermissionEnforcement admission policy for setting BlockOwnerDeletion: true on AWSMachinePool AWSMachines

[AndiDog]

What type of PR is this?

/kind bug

What this PR does / why we need it:

The optional OwnerReferencesPermissionEnforcement setting requires the following:

This admission controller protects the access to the metadata.ownerReferences of an object so that only users with delete permission to the object can change it. This admission controller also protects the access to metadata.ownerReferences[x].blockOwnerDeletion of an object, so that only users with update permission to the finalizers subresource of the referenced owner can change it.

Since CAPA adds AWSMachinePool as first owner of machine pool AWSMachine objects, it needs permission to update finalizers of AWSMachinePool. I'm also explicitly adding the delete permission as needed in the owning controller.

Checklist:

• squashed commits
• includes documentation
• includes emoji in title
• adds unit tests
• adds or updates e2e tests

Release note:

Add update permission for `AWSMachinePool` finalizers as needed by `OwnerReferencesPermissionEnforcement` admission policy for setting `BlockOwnerDeletion: true` on AWSMachinePool AWSMachines

[k8s-ci-robot]

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