Upgrade to Pydantic V2 [WIP]

[Adam-D-Lewis]

Reference Issues or PRs

This is a continuation of @fangchenli's work - https://github.com/nebari-dev/nebari/pull/1928

What does this implement/fix?

Put a x in the boxes that apply

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds a feature)
• [ ] Breaking change (fix or feature that would cause existing features not to work as expected)
• [ ] Documentation Update
• [ ] Code style update (formatting, renaming)
• [x] Refactoring (no functional changes, no API changes)
• [ ] Build related changes
• [x] Other (please describe): Upgrade dependencies

Testing

• [ ] Did you test the pull request locally?
• [ ] Did you add new tests?

Any other comments?