Support mirroring the multi-release payload

Feature Overview (aka. Goal Summary)  

One of the steps in doing a disconnected environment install is to mirror the images to a designated system. This feature enhances oc-mirror to not handle the multi release payload, that is the payload that contains all the platform images (x86, Arm, IBM Power, IBM Z). This is a key feature towards supporting disconnected installs in a multi-architecture compute i.e. mixed architecture cluster environment.

Goals (aka. expected user outcomes)

Customers will be able to use oc-mirror to enable the multi payload in a disconnected environment.

Requirements (aka. Acceptance Criteria):

Allow oc-mirror to mirror the multi release payload

Use Cases (Optional):

Include use case diagrams, main success scenarios, alternative flow scenarios.  Initial completion during Refinement status.

Questions to Answer (Optional):

Include a list of refinement / architectural questions that may need to be answered before coding can begin.  Initial completion during Refinement status.

Out of Scope

High-level list of items that are out of scope.  Initial completion during Refinement status.

Background

Provide any additional context is needed to frame the feature.  Initial completion during Refinement status.

Customer Considerations

Provide any additional customer-specific considerations that must be made when designing and delivering the Feature.  Initial completion during Refinement status.

Documentation Considerations

Provide information that needs to be considered and planned so that documentation will meet customer needs.  Initial completion during Refinement status.

Interoperability Considerations

Which other projects and versions in our portfolio does this feature impact?  What interoperability test scenarios should be factored by the layered products?  Initial completion during Refinement status.