allow profile to add additional namespace labels

/kind feature

**Why you need this feature:**
current `Profile` custom resource doesn't propagate its labels to namespace, this means there is no support for [istio discovery selectors](https://istio.io/latest/blog/2021/discovery-selectors/#introducing-discovery-selectors)

**Describe the solution you'd like:**
either `Profile` labels needs propagate to namespace levels or provide an option under spec to provide additional labels for the namespace
as a workaround, I am adding this label manually after namespace ie created

**Anything else you would like to add:**
No

Start by locating the Profile custom resource and the code that creates or manages its namespace. Determine how Profile labels could reach namespace metadata or how a spec option would define additional labels; done means the selected labels are applied consistently so Istio discovery selectors can use them.

Written by the indexing model from the issue text.