Pydanticv2 update

[jleaniz]

Description of the change

Updates FastAPI and OpenAPI client

• Update to latest FastAPI version
• Migrate to Pydantic version 2
• Re-generate API client. Allows file streaming for downloads/uploads
• Add progress bar for downloads using turbinia-client

Applicable issues

• fixes #1484

Additional information

Checklist

• [ ] All tests were successful.
• [ ] Unit tests added.
• [ ] Documentation updated.

[jleaniz]

Will re-open in a separate PR -- there have been a lot of changes since this one was opened.