Tighten data type for to_python / to_ruby

The Any data type accepts data we should probably not try to serialize,
e.g.

[default, Timestamp(), /.*/, Car(regnbr => 'abc123'), Integer[0,10], Deferred('f', [1,2,3]), Resource['file', '/tmp/tmp.txt']]

Prefer the Data data type.

Author: smortex

lib/puppet/functions/to_python.rb

@@ -16,7 +16,7 @@
 
 Puppet::Functions.create_function(:to_python) do
   dispatch :to_python do
-    param 'Any', :object
+    param 'Data', :object
   end
 
   # @param object

lib/puppet/functions/to_ruby.rb

@@ -16,7 +16,7 @@
 
 Puppet::Functions.create_function(:to_ruby) do
   dispatch :to_ruby do
-    param 'Any', :object
+    param 'Data', :object
   end
 
   # @param object