Add annotation to namespace from profile CRD

/kind question

**Question:**
Hi, I want to add annotation to a namespace created by kubeflow Profiles. If I looked correctly its not possible, only annotations added to a namespace is the owner of the profile.

https://github.com/kubeflow/kubeflow/blob/b922fa1573e4f0d19548f5ea94dbe3f78826bfed/components/profile-controller/controllers/profile_controller.go#L129

So with:
```
apiVersion: kubeflow.org/v1beta1
kind: Profile
metadata:
name: test
spec:
owner:
kind: User
name: user@test.com
```

Namespace created is:
```
>kubectl describe namespace test
Name: test
Labels: app.kubernetes.io/part-of=kubeflow-profile
istio-injection=enabled
katib.kubeflow.org/metrics-collector-injection=enabled
kubernetes.io/metadata.name=test
pipelines.kubeflow.org/enabled=true
serving.kubeflow.org/inferenceservice=enabled
Annotations: owner: user@test.com
```

Motivation:

We want to have several nodes in cluster dedicated to production workload and with annotation on namespace
```
> kubectl describe namespace production
Name: production
Annotations:
scheduler.alpha.kubernetes.io/node-selector: workset=production
```
we are able to separete production and research experimentation workloads.

Am I missing something or its a thing for contribution?

Start with the referenced components/profile-controller/controllers/profile_controller.go entry point and trace how a Profile is reconciled into a namespace. Check the Profile CRD fields and any nearby reconciliation tests, if present; done should mean a Profile can express the requested namespace annotation while preserving the existing owner annotation.

Written by the indexing model from the issue text.