Description of problem:
caBundles are stored on the mutatingWebhookConfiguration instance.
Kubemacpool and kubernetes-nmstate components use kube-admission-webhook (https://github.com/qinqon/kube-admission-webhook) pod to rotate ca certs and append them to the appropriate mutatingWebhookConfiguration.
After a large amount of rotations (~700+) then the caBundle appended to mutatingWebhookConfiguration cannot be applied due to etcd's APPLY side restirction (1.5Mb)

This results with the kubemacpool/kubernetes pods to decline requests on 
```
x509: certificate has expired or is not yet valid
```

on the kube-admission-webhook logs one can see that it fails to apply the caBundle:
```
failed rotating all certs: failed adding new CA cert to CA bundle at webhook: failed to update webhook CABundle: failed to update webhook CABundle: etcdserver: request is too large
```


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


How reproducible:


Steps to Reproduce:
1. manually cause a lot of ca rotations on kubemacpool/kubernetes-nmstate.
2.
3.

Actual results:
VM cannot be created, due to "x509: certificate has expired or is not yet valid"

Expected results:
VM should be able to be created with no errors.

Additional info: