epic: VirtualResources - stabilisation

[mjudeikis]

Demo Objective

This is epic to stabilise virtual resources to the point its can be used in production.

Demo Steps

No response

Action Items

• Scope of the current demo is necessary to fit in the prototype boundaries
• Contribute to the final demo script and recording

Stories

• docs: document virtual resources with Replication VW as an example #3662
• bug: CachedObjects are populated with PartialObjectMetadata #3478
• feature: CachedResources should validate that the replicated resource is cluster-wide #3644
• feature: Virtual Resources: add validation for ResourceSchemaStorageVirtual in APIExport spec #3657
• feature: add path to CachedResourceReference API #3658
• feature: Virtual Resources: fallback to VW discovery in AggregatingVersionDiscoveryAPIServer #3660