Description of problem:
There is suspicious behavior of virt-operator pod - each time when I'm updating Kubevirt configuration through the HCO - the memory usage of virt-operator increased on 15-20Mb.

Initially virt-operator pod used ~200Mb, but after updating HCO several times - the usage became ~400Mb and it never goes down (screenshot is attached)

The maximum in my tests I saw 450Mb (with 570Mb in peaks)

Version-Release number of selected component (if applicable):
4.12

How reproducible:
100%

Steps to Reproduce:
1. update kubevirt through HCO (for example by updating liveMigrationConfig parameters or by adding some annotations)
2. After updating HCO there is a peak of memory usage (which is probably expected), but when it goes down the memory usage is +15-20Mb from initial value