Install helm binary in ccm-deploy role before using it

The kubernetes.core.helm module requires helm CLI to be installed on
the target node. Added check and install step using the official
helm install script.

ansible/roles/ccm-deploy/tasks/main.yml

@@ -10,6 +10,26 @@
     msg: "hcloud secret not found in kube-system namespace. CCM requires it."
   when: hcloud_secret_check.rc != 0
 
+- name: Check if helm is installed
+  command: which helm
+  register: helm_check
+  changed_when: false
+  failed_when: false
+
+- name: Install helm
+  when: helm_check.rc != 0
+  block:
+    - name: Download helm install script
+      get_url:
+        url: https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
+        dest: /tmp/get-helm-3.sh
+        mode: "0755"
+
+    - name: Run helm install script
+      command: /tmp/get-helm-3.sh
+      args:
+        creates: /usr/local/bin/helm
+
 - name: Add Hetzner Helm repository
   kubernetes.core.helm_repository:
     name: hcloud