Allow MLRun CE Helm chart deployment into any namespace

[tal-haim]

Currently, the MLRun CE Helm chart templates hardcode the namespace as 'mlrun', which restricts installation to only that namespace and impedes use in custom namespaces (e.g., 'controller').

How to fix:

1. Search all YAML templates in charts/mlrun-ce/templates for lines with namespace: mlrun.
2. Replace any such instance with namespace: {{ .Release.Namespace }} to ensure resources are deployed to the namespace specified during Helm installation.
3. Confirm all Kubernetes manifests support namespace templating.
4. Test chart installation in multiple namespaces to verify correctness.

Impact:
This change will allow MLRun CE to be installed in any namespace, improving compatibility with CI/CD pipelines, multi-tenancy, and cluster organization.