[2004299] virt-handler goroutine count increases over time

+++ This bug was initially created as a clone of Bug #2004295 +++

Tracking for 4.9.z

Description of problem:
Opened as a follow-up to https://bugzilla.redhat.com/show_bug.cgi?id=1996660
Observed an additional slower goroutine leak.

How reproduceible:
Very reproduceible, must be run for an extended time to observe increase.

Steps to Reproduce:
Allow for any stabilization between each step.
While observing goroutines metric on virt-handler,
1. Create and Start a batch of 100-300 VMs
2. Delete all VMs in batch
3. Repeat

Expected Results:
Goroutines do not increase between VM deployments after initial deployment

Actual Results:
Over the course of approximately 48 hours, goroutine count increased between 14-28 per virt-handler.