Logic for Build Controller

[mcbenjemaa]

Summary

In order to add logic for the BUILD CR.

• we need to make the controller watches the Build CR.
• Verify if Build is not in deletion state or skip reconciliation
• Verify if the Build is not paused //spec.paused
• Build deleteCascade feature.

Note that Build CR logic can be similar to the Cluster Cr in CAPI:
https://github.com/kubernetes-sigs/cluster-api/blob/main/internal/controllers/cluster/cluster_controller.go