Configure/override the watcher pod template

[paalkr]

Is your feature request related to a problem? Please describe.
In some scenarios we need to configure the watcher pod specification, changing affinity, toleration or other pod settings. It's currently possible to configure the executor job template https://terranetes.appvia.io/terranetes-controller/admin/template/ but not the watcher pod template.

Describe the solution you'd like
An option to override the default watcher template similar to the executor job template

Describe alternatives you've considered
We have considered adding a mutating Kyverno policy to manipulate all the watcher pods, but this is a messy workaround. Not a real solution.