✨ Add v1beta1 API types

[hidekazuna]

What this PR does / why we need it:

Add v1beta1 API types

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #1046

Special notes for your reviewer:

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

This should be merged after #1041

TODOs:

• if necessary:
  • includes documentation

/hold

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hidekazuna

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [hidekazuna]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[netlify]

✔️ Deploy Preview for kubernetes-sigs-cluster-api-openstack ready!

🔨 Explore the source changes: 6ddafd8

🔍 Inspect the deploy log: https://app.netlify.com/sites/kubernetes-sigs-cluster-api-openstack/deploys/6194b6d61f73ea00079e04d6

😎 Browse the preview: https://deploy-preview-1047--kubernetes-sigs-cluster-api-openstack.netlify.app

[hidekazuna]

PTAL @sbueringer @jichenjc

[hidekazuna]

@jichenjc can we merge this? This PR is blocking API change.

[jichenjc]

/lgtm
/hold cancel

ok let's merge this first and see how we can move forward