remove cluster auditor files

General MR

Summary

remove cluster auditor files to deprecate clusterAuditor from big bang.

Relevant logs/screenshots

Testing still needed

Linked Issue

Closes #2664 (closed)

Upgrade Notices

Cluster Auditor is moving to maintained status. Big Bang team will continue to maintain the package but it will no longer be distributed with the umbrella helm chart. Users can still deploy cluster auditor using the packages section in the umbrella values.yaml.