DRA Extended Resource

Extended resource provides a simple, concise approach to describe resource capacity, and resource consumption. In constrast, Dynamic Resource Allocation (DRA) provides a more expressive, flexible approach, yet more complicated, and harder to use. This KEP provides a solution to enable cluster administrators to advertise the dynamic resources (in ResourceSlice) as extended resource via DeviceClass. and enables the application developers, and operators to continue using extended resource to request for such resources. This KEP provides dynamic allocation of resources to requests made through either extended resource, or DRA resource claim.