Switch DRA beta API to v1

[asahay19]

Starting from OpenShift 4.21 (Kubernetes 1.34), beta APIs are disabled by default.This PR migrates all DRA test code from resource.k8s.io/v1beta1 to resource.k8s.io/v1

Changes include:

• Updated all Go imports and client calls
• Restructured DeviceRequest to use the new Exactly field
• Updated Device struct access (removed Basic field)
• Migrated YAML test manifests to v1 API
• Updated JSON configs in MPS and time-slicing tests
• Tested against: OpenShift 4.21+ cluster with beta APIs disabled
• Relates to: [WIP] DRA e2e test to validate Nvidia gpu openshift/origin#29842