Adding two applications with the same ns causes sync ping-pong

[noam-codefresh]

When both applications create a overlayz/<project>/namespace.yaml file that tries to create the same namespace, Argo-CD adds different labels to the ns in each app, and it results in each application syncing over the changes from the other one.

[noam-codefresh]

I think we should have a central location where all of our namespace resource yamls are located. The app referencing this directory should not have any finalizers set (or at least - the namespaces themselves should be marked to not delete themselves on app deletion).

[roi-codefresh]

@noam-codefresh yeah, something like a namespaces application so it would have overlays for different clusters.