Is there an existing issue for this?
Current Behavior

Expected Behavior
skip scanning cluster libraries if it does no longer exist
Steps To Reproduce
No response
Cloud
AWS
Operating System
macOS
Version
latest via Databricks CLI
Relevant log output
see https://github.com/databrickslabs/ucx/blob/main/src/databricks/labs/ucx/source_code/jobs.py#L305-L334