Add missing packages for installation on Debian

Debian default cloud images didn't have following packages by default:
* git
* gnupg

Sem-Ver: bugfix

Change-Id: Ia4dd306aefcfe3ce6d5680ac17d7e1928f42c15f
diff --git a/roles/helm/tasks/debian.yml b/roles/helm/tasks/debian.yml
index c636b37..59df4d0 100644
--- a/roles/helm/tasks/debian.yml
+++ b/roles/helm/tasks/debian.yml
@@ -30,7 +30,7 @@
 
 - name: Install packages
   ansible.builtin.apt:
-    name: ["helm"]
+    name: ["git", "helm"]
     install_recommends: false
 
 - name: add bash autocomplete for helm