Use any() to stub getCallbackParameter/ReturnType

This is used in all other languages not currently using dataflow type
pruning.

Author: owen-mc

go/ql/lib/semmle/go/dataflow/internal/FlowSummaryImplSpecific.qll

@@ -46,13 +46,14 @@ DataFlowType getReturnType(SummarizedCallable c, ReturnKind rk) { any() }
  * Gets the type of the `i`th parameter in a synthesized call that targets a
  * callback of type `t`.
  */
-DataFlowType getCallbackParameterType(DataFlowType t, int i) { none() }
+bindingset[t, pos]
+DataFlowType getCallbackParameterType(DataFlowType t, ArgumentPosition pos) { any() }
 
 /**
  * Gets the return type of kind `rk` in a synthesized call that targets a
  * callback of type `t`.
  */
-DataFlowType getCallbackReturnType(DataFlowType t, ReturnKind rk) { none() }
+DataFlowType getCallbackReturnType(DataFlowType t, ReturnKind rk) { any() }
 
 /** Gets the type of synthetic global `sg`. */
 DataFlowType getSyntheticGlobalType(SummaryComponent::SyntheticGlobal sg) { none() }