Graduate Provisioning Request API to V1

[dsafdsa1]

Which component are you using?:

cluster-autoscaler

Is your feature request designed to solve a problem? If so describe the problem this feature should solve.:

Describe the solution you'd like.:

Describe any alternative solutions you've considered.:

Additional context.:
I was asked to create this issue as part of enabling the Provisioning Request API in Autopilot clusters in GKE. There is a concern about enabling beta APIs by default, so we should ensure that:
- We switch to v1 at some point.
- The v1 API is compatible with the beta API.

[adrianmoisey]

/area cluster-autoscaler

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