Fix print outputs in Jupyter notebook (deephaven#4324)

Fixes deephaven#4277

Essentially, the parent needs to be updated so that Jupyter's OutputStream can redirect the output properly
More info here: StanfordLegion/legion#1393

Tested with code at deephaven#4277

py/server/deephaven_internal/stream.py

@@ -93,3 +93,7 @@ def close(self):
     def __del__(self):
         # Do nothing, override superclass which would call close()
         pass
+
+    def set_parent(self, parent):
+        # Parent needs to be set on the original stream so that output shows in proper cell
+        self._stream.set_parent(parent)