Description of problem:

ArgoCD plugin shows 500 internal service error when application with appName is not existing. Instead, it should just list it found no applications with app name in ArgoCD instance when searching for applications.

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

• specify nonexistent name under annotation argocd/app-name

  Actual results:

Expected results:

Reproducibility (Always/Intermittent/Only Once):

Build Details:

Additional info (Such as Logs, Screenshots, etc):