Merge "Remove deprecated dialects and drivers" into main

diff --cc doc/build/conf.py
Simple merge

diff --cc lib/sqlalchemy/engine/reflection.py
Simple merge

diff --cc setup.cfg
Simple merge

diff --cc test/orm/test_deprecations.py
Simple merge

diff --cc test/orm/test_mapper.py
Simple merge

diff --cc test/orm/test_unitofwork.py
Simple merge