gh-133595: Clean up sqlite3.Connection APIs (GH-133605)

* All parameters of sqlite3.connect() except "database" are now keyword-only.
* The first three parameters of methods create_function() and
  create_aggregate() are now positional-only.
* The first parameter of methods set_authorizer(), set_progress_handler()
  and set_trace_callback() is now positional-only.