feature: dynamic rest mapper

[mjudeikis]

Feature Description

We need to create a dynamic rest mapper so we can resolve KindToResource and ResourceToKind:

TL:DR:

• informers on APiBindings of the shard, CRDs + core types (hardcoded, don't need to watch)
• Fill inmemory mapper
• comply with upstream rest mapper interface:
• https://github.com/kubernetes/apimachinery/blob/master/pkg/api/meta/restmapper.go

type DefaultRESTMapper struct {
	defaultGroupVersions []schema.GroupVersion

	resourceToKind       map[schema.GroupVersionResource]schema.GroupVersionKind
	kindToPluralResource map[schema.GroupVersionKind]schema.GroupVersionResource
	kindToScope          map[schema.GroupVersionKind]RESTScope
	singularToPlural     map[schema.GroupVersionResource]schema.GroupVersionResource
	pluralToSingular     map[schema.GroupVersionResource]schema.GroupVersionResource
}

and https://github.com/kubernetes/apimachinery/blob/master/pkg/api/meta/interfaces.go#L113

Make it globally accessible so any controller can use it.

Proposed Solution

n/a

Alternative Solutions

No response

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Additional Context

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[mjudeikis]

Should be very similar to front-proxy indexer we have for logicalcluster, workspaces,mounts

[gman0]

Taking!

[gman0]

/assign