Skip k8s resources that have an empty name during resource deletion

[ddelnano]

Summary: Skip k8s resources that have an empty name during resource deletion

Newer versions of k8s break our px delete cli logic (see details on #2029). I tracked this down to the the condition function in our ObjectDeleter. I believe the newer versions of k8s added resources that match our visitor, but don't have a resource name. From my testing, it seemed related to the ValidatingAdmissionPolicies or ValidatingAdmissionPolicyBindings resources.

Relevant Issues: Closes #2029

Type of change: /kind bugfix

Test Plan: Deployed a vizier and verified that a subsequent px delete deleted the following

• pl namespace
• px-operator namespace
• Cluster scoped resources: pl-cloud-connector-role, pl-vizier-metadata and pl-node-view cluster roles

Changelog Message: Fixed an issue that caused px delete to fail on newer k8s clusters (1.30 and later)