label CRDs with owning ResourceGroup information

[a-hilaly]

Feature Description

Currently when kro creates CRDs from ResourceGroups, these CRDs lack metadata about their origin. ideally we to automatically label CRDs with their owning ResourceGroup information. This allows kro to track which ResourceGroup owns which CRD, enabling better conflict detection and resource management.

We can leverage the metadata library that we already use for sub resources https://github.com/awslabs/kro/blob/main/pkg/metadata/labels.go

[gerardocorea]

Instead of labels should owner references be set on the child resources so should the parent resource be deleted the child ones will also be cleaned up? i wouldnt mind looking into this.

[Gonfidel]

I have created MR #282 in response to this issue. Please let me know if this meets the issues requirements!