use viper watcher instead of configmap watcher for config changes

[Prateeknandle]

Feature Request

• mount configmap
• k8s handles updates
• viper watcher will update kubearmor configurations

viper watcher is implemented in #1862 (might need to update it or handle separately for k8s)

[tesla59]

Hey @Prateeknandle
I would be interested in picking this issue as well

Will share the proposal after going through the config watcher code