Description of problem:

The CL instance only specifies a collector: vector, there is no logstore. When you create a forwarder instance the collector logs are created. When you delete the forwarder the collector pods remain.

Version-Release number of selected component (if applicable):

Only occurs on 5.9 (master) branch. Verified it dDoes not occur in 5.8

How reproducible:

every time

Steps to Reproduce:

1. install vector only CL instance (no logstore)
2. create clf instance and observe pods created
3. delete clf instance and observe pods are not removed

Actual results:

collector pods remain

Expected results:

collector pods are removed since there is no longer a forwarder (or logstore)

Additional info:

I believe the issue is occurring here: https://github.com/openshift/cluster-logging-operator/blob/master/controllers/forwarding/forwarding_controller.go#L92
Since the clf instance is already removed before this method, "instance.Namespace" and "name" are both not found, so it fails to remove DS.