Feature request: blacklist namespaces annotation

[laconictae]

Hello,

Apologies if this is already a feature request somewhere, I did a cursory search and didn't see anything.

What would be really useful for us is an annotation to blacklist namespaces for reflection of the secret/configmap (e.g. the opposite annotation of the existing reflector.v1.k8s.emberstack.com/reflection-allowed-namespaces). Ideally, both annotations would allow wildcards for selection - we have a series of namespaces titled like dev-1, dev-2 etc. where being able to annotate a configmap we want mirrored everywhere except those namespaces would look like:

reflector.v1.k8s.emberstack.com/reflection-disallowed-namespaces: "dev-*"