Pod and PDB list page just report "Not found" when no resources found 

4.12.0-0.nightly-2022-10-15-094115

Always

1. normal user has a new empty project
2. normal user visit PDB list page via Workloads ->  PodDisruptionBudgets 
3.

2. it just reports 'Not found'

2. for other workloads, it will report "No <resource> found", for example
No HorizontalPodAutoscalers found
No StatefulSets found
No Deployments found

so for Pods and PodDisruptionBudgets list page, when no resource can be found, it's better that we also reports "No pods found" and "No PodDisruptionBudgets found"