Tumbling and Sliding Windows are not implemented in Python pulsar function

Tumbling and Sliding Windows are implemented in the Java version of the Pulsar functions but not in the Python one.

It is needed to modify the python instance used for the execution of the python pulsar function in order to handle window configuration.

Compare the Java implementation of tumbling and sliding windows with the Python function instance used for execution, then trace how window configuration reaches that instance. Done means the Python path handles both window types consistently with the Java behavior.

Written by the indexing model from the issue text.