Support unsealing into multiple namespaces

[KlavsKlavsen]

Which component:
Controller

Is your feature request related to a problem? Please describe.
We have several containers that needs fetching from a password protected registry - and currently we have to have the SAME secret defined for each namespace we need them in.

We also have other secrets, which we have to duplicate in multiple namespaces

Describe the solution you'd like
If we could put multiple namespace targets on 1 secret - that would make life so much easier :)

[rowi1de]

You can try this as a workaround https://github.com/emberstack/kubernetes-reflector but it would be a really helpful feature