This is partner driver request to backport and update their cinder-specific driver to the  Flamingo version.  This is driver-only code, not core Cinder changes. 

Goals / Acceptance Criteria 

• Backport the driver and deliver in the RHOS-18 
• Pass downstream regression CI tests for Cinder

Use Cases

• Ability to configure IOPS for a volume that can change on their own based on the volume size.
• Reduce excessive typing with a dynamic parameter.

Out of Scope

• No RH testing needed other than Cinder automation
• Other patches beyond the scope of this change set.

Documentation Considerations

No RH customer docs

Questions to Answer

• None{}

Describe the customer impact

• Allows the customer to configure settings that behave dynamically instead of requiring them to hand-monitor settings

Additional links

• Merge Request: https://review.opendev.org/c/openstack/cinder/+/967141