Allow to set hostUsers: false for all workloads

**Is your feature request related to a problem? Please describe.**

We want to run as many pods as possible with [user namespaces](https://kubernetes.io/docs/tasks/configure-pod-container/user-namespaces/) to enhance security in our cluster.

**Describe the solution you'd like**

The helm chart should allow us to set the `hostUsers` field for all workloads. It should still allow not setting this field at all for users who run an old Kubernetes version or a runtime that does not support user namespaces yet.

**Describe alternatives you've considered**

A kustomize-based patch on top of the helm chart.

**Additional context**

User namespaces will be GA with Kubernetes 1.35 but are already enabled by default since 1.33.