gh-143993: Document ways to disable remote debugging support (#143994)

Although PEP 768 mentions how to disable the mechanism of
remote debugging, it is not documented in the Python docs.

This change adds a note on how to disable remote debugging support
in a Python interpreter to the remote debugging how-to.

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>