CKP Provider Cluster APIs

CKP exposes REST APIs for managing provider cluster configurations:

API Category	Operations
Provider Cluster CRUD	Create, update, and delete provider cluster configurations
Provider Cluster Lookup	Retrieve by name, by cluster ID, or list all within a domain or project
Provider Validation	Check whether a domain has a provider cluster configured
Unscoped Queries	List all provider clusters across domains (platform-level)