CAPI: Automation for deepcopy and audit internal types

[enxebre]

Currently the deepcopy code for the internal CAPI types i.e machineSet and machineDeployment is harcoded here https://github.com/kubernetes/autoscaler/blob/master/cluster-autoscaler/cloudprovider/clusterapi/zz_generated.deepcopy.go.
We need to:
-Provide automation to generate the script.

-Auditing. For this there are two options:
1- Mirror the CAPI types into our internal types and fuzzy test round trips API server->unstructure->internal type -> unstructure.

2- Drop any field from the internal types which is not needed/supported in the autoscaler provider, gate on it and unit test those. This won't hide any issue for a developer trying to leverage a new field of the public CAPI types as this wouldn't exist in the internal types, therefore preventing golang from compiling.

[enxebre]

/area provider/cluster-api

[enxebre]

cc @JoelSpeed @elmiko

[fejta-bot]

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Mark the issue as fresh with /remove-lifecycle stale.
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/lifecycle stale

[enxebre]

/remove-lifecycle stale

[benmoss]

Can we close this since we merged #3312 ?

[elmiko]

certainly seems like we can to me.

plus, we can always re-open if need be ;)
/close

[k8s-ci-robot]

@elmiko: Closing this issue.

In response to this:

certainly seems like we can to me.

plus, we can always re-open if need be ;)
/close

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