[Core] Some python binding clean up (I)

[loumalouomega]

📝 Description

This PR makes changes to two Python interface files, add_amgcl_solver_to_python.cpp and add_bounding_box_to_python.cpp. Here's a summary of the changes:

1. In add_amgcl_solver_to_python.cpp:

   • Clean up header.
   • Some addiomal clean up and refactor.

2. In add_bounding_box_to_python.cpp:

   • Clean up header.
   • Some addiomal clean up and refactor.

🆕 Changelog

• Some python binding clean up