add rbac generation to manifests build step

[rsmitty]

What this PR does / why we need it:
Adds RBAC generation to Makefile in the git book. When working through the provider implementation instructions in the git book, I ran into the same issues that were mentioned and fixed in PR #750. However, simply adding these annotations to the actuator files didn't resolve the issues. They required a regeneration of the RBAC manifests. This PR adds the RBAC generation to the Makefile so that it happens everytime make manifests is called. This seems to fix said issue.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes N/A

Special notes for your reviewer:
N/A

Release note:

NONE

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[k8s-ci-robot]

Hi @rsmitty. Thanks for your PR.

I'm waiting for a kubernetes-sigs or kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[rsmitty]

you know what, nevermind. I actually didn't see that this was fixed in master, as I had an older checkout locally. sorry for the confusion.