--Object/AO creation refactor and Object/AO Instance save/creation

[jturner65]

Motivation and Context

This PR is intended to address an issue when saving a scene instance, where an AO 's current configuration is not being saved as a SceneAOInstance. In the process this PR also simplifies object/AO creation and makes sure some important processes always take place (which was not formerly the case) such as saving an instance creation attributes upon object/ao creation (and creating a default one if none exists)

How Has This Been Tested

All existing c++ and python tests pass.

Types of changes

• [x] Docs change / refactoring / dependency upgrade
• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have completed my CLA (see CONTRIBUTING)
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.