Copy source annotations and labels

[Wieneo]

This PR changes the reflector to copy annotations and labels from the source secret/configmap to the target.

[sando38]

That would be a great extension! Literally just have looked for the respective config in the repository.

[Wieneo]

@winromulus could you have a look at this? :)

[mircea-pavel-anton]

Hi, @winromulus! Sorry for the ping (again 😅 ). This is also crucial for me as I use this to mirror some configmaps containing CA secrets to my trust-manager namespace and then use a labelSelector to build up my CA Bundle. I would love for this to be added as it is quite blocking at the moment.

I can't create empty secrets/configmaps in the target namespace easily since this is meant to be used in a multi-cluster deployment and I don't have as much control over that

[winromulus]

Please update the documentation as well and also this needs a flag that enables the functionality (it needs to be backwards compatible but also some people have deployments where the labels and annotaitons should NOT be copied because it crashes external tools).

[tomkukral]

I'd love to have this feature available.