Story 60641538: Don't rely on parent_instance for Audit tree nodes to be a program
Add route to styleguide page with new layout

* Also copied `layouts/dashboard.haml` to `styleguide/new_layout.haml`
Merge pull request #560 from reciprocity/feature/my-work-mapping-error

Fix Audit GDrive folder template expecting parent_instance to be a Program (#60641538)
Merge pull request #570 from reciprocity/feature/example-new-layout-styleguide

Add route to styleguide page with new layout
Ensure all owned objects appear on "My Work" page

* E.g., include join via 'ObjectOwner' mapping in searches with
  `owner_id` provided
Show "Request Assignee" and "Response Owner" in Audit list

* Previously, Audits could appear without a clear reason why they're on
  in the list.
Merge pull request #572 from reciprocity/feature/add-object-owner-to-mywork

Ensure all owned objects appear on "My Work" page
Merge branch 'develop' into feature/database-changes-fixed

Conflicts:
	src/ggrc/models/audit.py