(ccs_software::pre) add curl and wget to required packages

These are used internally by the ccs install process.
At least on rhel8, it is possible to install a system without wget,
which then causes the ccs install to fail partway through, leaving the
installation directory present but empty.

manifests/pre.pp

@@ -10,6 +10,8 @@
     'unzip',
     'git',
     'python3',
+    'curl-minimal',
+    'wget',
   ]
 
   ensure_packages($deps)