Documentation supports the following use cases:

• As a VM owner I want to provide my own vCPU and memory resource sizing while using commonly deployed instance types
• As a VM owner I want to create customized versions of commonly deployed instance types and preferences specific to my workload use case
• As a cluster admin I want users to be able to provide their own vCPU and memory resource sizing when using commonly deployed instance types
• As a cluster admin I want to create customized versions of commonly deployed instance types and preferences specific to my workload use case

Document the new UI too.

• MUST allow custom instance type sizing via VM
• MUST reject custom instance type sizing via VM when already provided by instance type
• MUST provide custom common instance type sizes
• MUST be exposed through virtctl create vm
• MUST be exposed through the UI
• MUST have tier 1 functional tests
• MUST be documented