Prow: Temporary autoscaler RBAC workaround

[lentzi90]

There is a bug in the autoscaler that makes it get stuck on a permission
issue sometimes. It doesn't really need these permissions for our
use-case, but adding them should hopefully avoid it getting stuck.

See kubernetes/autoscaler#6490

Fixes: #881

[tuminoid]

/approve

Discussed offline and also seen this in the logs A LOT. Thanks for the workaround.

[metal3-io-bot]

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[adilGhaffarDev]

thank you
/lgtm

[lentzi90]

Thanks for the reviews!
Adding hold until I have the time to apply and check that it works
/hold

[lentzi90]

It is now applied and looking good. I guess we will know for sure if it worked after a few days.
/hold cancel
/override metal3-ubuntu-e2e-integration-test-main

[metal3-io-bot]

@lentzi90: Overrode contexts on behalf of lentzi90: metal3-ubuntu-e2e-integration-test-main

In response to this:

It is now applied and looking good. I guess we will know for sure if it worked after a few days.
/hold cancel
/override metal3-ubuntu-e2e-integration-test-main

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