--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

• Docs change / refactoring / dependency upgrade
• 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

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

[aclegg3]

Found the bug was from another source, but still a nice clean-up pass. 👍
Thanks!