Goal: 

Upstream patches for the following are reviewed and merged:

• Remaining references to the legacy v2 API should be removed and any code merged into the v3 controller.
• In addition, any use of auto-generated routes should be replaced with explicit method-path routing.

Acceptance Criteria:

Upstream patches in this series are reviewed and merged:

• https://review.opendev.org/q/topic:%22openapi%22+project:openstack/cinder