Fix image werf templae for packages build

Signed-off-by: dmitry.trofimov <[email protected]>

Author: dmitry.trofimov

.werf/defines/images.tmpl

@@ -39,11 +39,11 @@ Result:
 {{-     range $packages -}}
 {{-       $image := trim . -}}
 {{-       if ne $image "" }}
-- image: packages/{{ $image }}
+- image: {{ $context.ModuleNamePrefix }}packages/{{ $image }}
   add: /{{ $image }}
   to: /{{ $image }}
   before: {{ $stage }}
 {{-       end }}
 {{-     end -}}
 {{-   end }}
-{{ end }}
+{{ end }}