Update autocaler RBAC to accomodate machinepools support added upstream

[enxebre]

This is needed to let the autoscaler to operate openshift/kubernetes-autoscaler#256 (comment) kubernetes/autoscaler#4676

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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[imain]

/lgtm

[enxebre]

rebased to pick Red Hat Trusted App Pipeline fix

[muraee]

/lgtm

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD 0369e1b and 2 for PR HEAD b864dee in total

[openshift-ci]

@enxebre: all tests passed!

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