[UX2.0] Resolve Issue Update Existing Entries Within Policy Objects

[seconroy]

Description

Resolve Issue Updating Existing Entries Within Policy Objects

Entries within policies objects will only contain a single entry and thus updateFromBody is causing issue looking for ID parameters that have been changed and causes a new entry to be create in the differ. This change implements Policy Object more inline with with the Classic implementation.

Types of Changes

• [ ] New feature (non-breaking change which adds functionality)
• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Build/CI change
• [ ] Code quality improvement/refactoring/documentation (no functional changes)

Checklist

• [x] My code follows the code style of this project
• [x] I have added tests to cover my changes
• [x] All new and existing tests pass locally

[seconroy]

That will require an attribute level implementation rather than a resource level implementation to make sure we don't effect other parameters or a general rework to improve support when an object contains only one attribute and no ID