v1beta3 API

[vignesh-goutham]

From few of the features as well as bugs we are tracking, some of them require an API change, which are all sizable enough and non-additive to warrant a new API version. This issue will track all tasks required to introduce the new API version.

### Tasks
- [x] Create a new branch `switch-to-v1beta3` which will house all new API until they are stable enough to be merged to `main`
- [x] Basic API skeleton for `v1beta3` version. This includes definition of API, conversions across Hub and Spokes, along with CRDs. PR - https://github.com/kubernetes-sigs/cluster-api-provider-cloudstack/pull/272, https://github.com/kubernetes-sigs/cluster-api-provider-cloudstack/pull/275
- [x] Changes + Fixes + Features that require API changes planned for `v1beta3`
- [x] Cluster Template changes to point to new API version
- [x] Kubebuilder PROJECT changes to new API version. PR - https://github.com/kubernetes-sigs/cluster-api-provider-cloudstack/pull/275
- [x] Add conversions between hub and spoke versions for lossless conversion. PR- https://github.com/kubernetes-sigs/cluster-api-provider-cloudstack/pull/275
- [x] Merge branch to main

[vignesh-goutham]

/close

[k8s-ci-robot]

@vignesh-goutham: Closing this issue.

In response to this:

/close

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