Add hpcai OpenSora v1.2 - 3D VAE inference

[SamitHuang]

What does this PR do?

Fixes # (issue)

Adds # (feature) opensora v1.2 vae:

• Temporal VAE
• 3D VAE consisted of spatial vae + temporal vae

Passed test on 910*

• Video Reconstruction, PNSR 31
• Inference integrated with stdit v2

Before submitting

• [x] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• [x] Did you read the contributor guideline?
• [x] Did you make sure to update the documentation with your changes? E.g. record bug fixes or new features in What's New. Here are the documentation guidelines
• [ ] Did you build and run the code without any errors?
• [ ] Did you report the running environment (NPU type/MS version) and performance in the doc? (better record it for data loading, model inference, or training tasks)
• [ ] Did you write any new necessary tests?

Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag members/contributors who may be interested in your PR.

@xxx