Fix build due to new checks in PostgreSQL 16

Use UInt64GetDatum instead of Int64GetDatumFast for uint64 variables as the
input data type is now checked (see the commit
c8b2ef05f481ef06326d7b9f3eb14b303f215c7e in PostgreSQL 16).

Author: Marina Polyakova

Diff for: pg_wait_sampling.c

@@ -546,7 +546,7 @@ pg_wait_sampling_get_current(PG_FUNCTION_ARGS)
 		else
 			nulls[2] = true;
 
-		values[3] = Int64GetDatumFast(item->queryId);
+		values[3] = UInt64GetDatum(item->queryId);
 		tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
 
 		SRF_RETURN_NEXT(funcctx, HeapTupleGetDatum(tuple));
@@ -732,11 +732,11 @@ pg_wait_sampling_get_profile(PG_FUNCTION_ARGS)
 			nulls[2] = true;
 
 		if (pgws_collector_hdr->profileQueries)
-			values[3] = Int64GetDatumFast(item->queryId);
+			values[3] = UInt64GetDatum(item->queryId);
 		else
 			values[3] = (Datum) 0;
 
-		values[4] = Int64GetDatumFast(item->count);
+		values[4] = UInt64GetDatum(item->count);
 
 		tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
 
@@ -848,7 +848,7 @@ pg_wait_sampling_get_history(PG_FUNCTION_ARGS)
 		else
 			nulls[3] = true;
 
-		values[4] = Int64GetDatumFast(item->queryId);
+		values[4] = UInt64GetDatum(item->queryId);
 		tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
 
 		history->index++;