forgejo: Ensure helm utility is available on os-control machines

Signed-off-by: David Kirwan <davidkirwanirl@gmail.com>

playbooks/groups/os-control.yml

@@ -33,6 +33,18 @@
       group: root
       mode: "0770"
 
+  - name: Install helm if not exists
+      unarchive:
+        src: https://get.helm.sh/helm-v3.17.0-linux-amd64.tar.gz
+        dest: /usr/local/bin
+        extra_opts: "--strip-components=1"
+        owner: root
+        group: root
+        mode: 0755
+        remote_src: true
+      args:
+        creates: /usr/local/bin/helm
+
   - name: Copy oc rpm
     ansible.builtin.copy:
       src: /srv/web/infra/bigfiles/openshiftboot/oc-client/oc-client.rpm