OAT: Add preview badge for V3 models

[msnyder-msft]

Summary of changes 🔍

Adding a preview badge when a model is V3 so people know it might not work.

Testing 🧪

Try the editor stories /story/components-oat-oatpropertyeditor--model-selected-editor-v-3-preview

Checklist ✔️

• [ ] Linked associated issue (if present)
• [ ] Added relevant labels
• [ ] Requested developer reviews
• [ ] Request UI review from design / PM
• [ ] Verify all code checks are passing

[github-actions[bot]]

:tada: This PR is included in version 1.0.0-beta.363 :tada:

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: