Return node IDs path as variant array

So that node IDs are not all cast to strings, but instead keep their
original type from the input table.

Author: adamnsch

core-api/src/main/java/org/neo4j/gds/api/properties/relationships/Path.java

@@ -26,7 +26,9 @@
 @Value.Modifiable
 public interface Path {
 
-    String[] nodeIds();
+    Object[] nodeIds();
+
+    Object[] nodeIdKeyTypes();
 
     String[] nodeLabels();