FuseML uninstaller gets stuck while deleting extensions

[stefannica]

When deleting an extension with the FuseML installer (e.g. fuseml-installer extensions --remove kserve), the installer gets stuck. This happens because the installer tries to delete the CRDs as part of the uninstallation process, but this cannot happen while there are resources still configured in the fuseml-workloads namespace, or in any other namespace for that matter.

The workaround for this is to manually delete all related resources before deleting the extension.

[stefannica]

Some ideas on how this could potentially be solved:

• enhance the installer to run a check for any related resources and:
  • skip the CRD deletion if resources are still present in the cluster, or
  • skip deleting the extension, or
  • forcefully remove all related resources from the fuseml-workloads namespace before removing the extension (this behavior should be controlled with an installer command line flag)