Update object change context manager to be aware of the change source

[gsnider2195]

Closes: #1876

What's Changed

• Add new fields to ObjectChange model
  • change_context
  • change_context_detail
• Add ObjectChangeEventContextChoices to nautobot.extras.choices for ObjectChange.change_context field choices
• Update objectchange template to add change_context and change_context_detail to the object detail view
• Add new ChangeContext class to be used as input to the change_logging context manager. This class stores the user, change context, change context detail and unique id for the change
• Add ChangeContext convenience subclasses for:
  • JobChangeContext
  • WebChangeContext
  • ORMChangeContext
• Update web_request_context context manager to use ORMChangeContext
• Update run_job to use JobChangeContext
• Update handle_changed_object and handle_deleted_object signals to use ChangeContext instead of a WSGIRequest

TODO

• Explanation of Change(s)
• Attached Screenshots, Payload Example
• Unit, Integration Tests
• Documentation Updates (when adding/changing features)
• Example Plugin Updates (when adding/changing features)
• Outline Remaining Work, Constraints from Design

[glennmatthews]

This looks really promising! Nice work.