Add config flag for SQLAlchemy vs. Flask-SQLAlchemy Extension

Achieved it this way, but it would be nice if there was an option within flask-debugtoolbar to toggle the use between the two:

# https://pypi.org/project/flask-debugtoolbar-sqlalchemy/
# https://git.sr.ht/~ihabunek/flask_debugtoolbar_sqlalchemy/tree/master

# Remove the Flask-SQLAlchemy Extension specific SQLAlchemyDebugPanel and Replace with SQLAlchemyPanel

app.config['DEBUG_TB_PANELS'] = tuple(
      list(
            map(
                  lambda x: x.replace(
                        'flask_debugtoolbar.panels.sqlalchemy.SQLAlchemyDebugPanel',                                                                         
                        'flask_debugtoolbar_sqlalchemy.SQLAlchemyPanel'
                  ), 
                  list(
                        app.config['DEBUG_TB_PANELS']
                  )
            )
      )
)

Start by reading how DEBUG_TB_PANELS currently selects flask_debugtoolbar.panels.sqlalchemy.SQLAlchemyDebugPanel and compare it with flask_debugtoolbar_sqlalchemy.SQLAlchemyPanel. Done means users can configure a flag to choose either integration without manually rewriting the panel list, with the existing behavior preserved.