Restore documented puppetdb_query BoltSpec mocking

The documented (and previous to PR #3092 working) puppetdb_client
mocking expected only a single value to the function (the query).
This change restores that behavior.

Author: seanmil

bolt-modules/boltlib/lib/puppet/functions/puppetdb_query.rb

@@ -37,16 +37,21 @@
   # The query type could be more specific ASTQuery = Array[Variant[String, ASTQuery]]
 
   def make_query(query)
-    make_query_with_instance(query, nil)
+    puppetdb_client.make_query(query)
   end
 
   def make_query_with_instance(query, instance)
+    puppetdb_client.make_query(query, nil, instance)
+  end
+
+  private
+
+  def puppetdb_client
     puppetdb_client = Puppet.lookup(:bolt_pdb_client)
     # Bolt executor not expected when invoked from apply block
     executor = Puppet.lookup(:bolt_executor) { nil }
     # Send Analytics Report
     executor&.report_function_call(self.class.name)
-
-    puppetdb_client.make_query(query, nil, instance)
+    puppetdb_client
   end
 end