Create SQLalchemy stubs using stubgen (#6585)

stubs/SQLAlchemy/@tests/stubtest_allowlist.txt

@@ -0,0 +1,109 @@
+# wrong argument name in implementation ("self" instead of "cls")
+sqlalchemy.engine.URL.__new__
+sqlalchemy.engine.url.URL.__new__
+sqlalchemy.util.langhelpers._symbol.__new__
+
+# unnecessary re-exports
+sqlalchemy.util._collections.*
+sqlalchemy.util.compat.*
+
+# stdlib re-exports with stubtest issues
+sqlalchemy.orm.collections.InstrumentedList.*
+sqlalchemy.orm.collections.InstrumentedSet.*
+sqlalchemy.orm.collections.MappedCollection.*
+sqlalchemy.util.OrderedDict.get
+sqlalchemy.util.StringIO.*
+sqlalchemy.util.byte_buffer.*
+sqlalchemy.util.column_dict.get
+
+# method arguments starting with double underscores in the implementation
+sqlalchemy.testing.resolve_lambda
+sqlalchemy.testing.util.resolve_lambda
+sqlalchemy.util.WeakSequence.__init__
+
+# not always present
+sqlalchemy.testing.util.non_refcount_gc_collect
+
+# replaced at runtime
+sqlalchemy.orm.strategy_options.contains_eager
+sqlalchemy.orm.strategy_options.load_only
+sqlalchemy.orm.strategy_options.joinedload
+sqlalchemy.orm.strategy_options.subqueryload
+sqlalchemy.orm.strategy_options.selectinload
+sqlalchemy.orm.strategy_options.lazyload
+sqlalchemy.orm.strategy_options.immediateload
+sqlalchemy.orm.strategy_options.noload
+sqlalchemy.orm.strategy_options.raiseload
+sqlalchemy.orm.strategy_options.defaultload
+sqlalchemy.orm.strategy_options.defer
+sqlalchemy.orm.strategy_options.undefer
+sqlalchemy.orm.strategy_options.undefer_group
+sqlalchemy.orm.strategy_options.with_expression
+sqlalchemy.orm.strategy_options.selectin_polymorphic
+sqlalchemy.testing.provision.configure_follower
+sqlalchemy.testing.provision.create_db
+sqlalchemy.testing.provision.drop_all_schema_objects_post_tables
+sqlalchemy.testing.provision.drop_all_schema_objects_pre_tables
+sqlalchemy.testing.provision.drop_db
+sqlalchemy.testing.provision.follower_url_from_main
+sqlalchemy.testing.provision.generate_driver_url
+sqlalchemy.testing.provision.get_temp_table_name
+sqlalchemy.testing.provision.post_configure_engine
+sqlalchemy.testing.provision.prepare_for_drop_tables
+sqlalchemy.testing.provision.run_reap_dbs
+sqlalchemy.testing.provision.set_default_schema_on_connection
+sqlalchemy.testing.provision.stop_test_class_outside_fixtures
+sqlalchemy.testing.provision.temp_table_keyword_args
+sqlalchemy.testing.provision.update_db_opts
+
+# requires other packages
+sqlalchemy.testing.plugin.pytestplugin
+
+# can't be imported
+sqlalchemy.testing.fixtures
+sqlalchemy.testing.pickleable
+sqlalchemy.testing.plugin.bootstrap
+
+# Initialized to bool during __init__()
+sqlalchemy.orm.Mapper.single
+sqlalchemy.orm.mapper.Mapper.single
+
+# Dynamically added methods where the first argument is not named "self"
+sqlalchemy.orm.Load.contains_eager
+sqlalchemy.orm.Load.defaultload
+sqlalchemy.orm.Load.defer
+sqlalchemy.orm.Load.immediateload
+sqlalchemy.orm.Load.joinedload
+sqlalchemy.orm.Load.lazyload
+sqlalchemy.orm.Load.load_only
+sqlalchemy.orm.Load.noload
+sqlalchemy.orm.Load.raiseload
+sqlalchemy.orm.Load.selectin_polymorphic
+sqlalchemy.orm.Load.selectinload
+sqlalchemy.orm.Load.subqueryload
+sqlalchemy.orm.Load.undefer
+sqlalchemy.orm.Load.undefer_group
+sqlalchemy.orm.Load.with_expression
+sqlalchemy.orm.strategy_options.Load.contains_eager
+sqlalchemy.orm.strategy_options.Load.defaultload
+sqlalchemy.orm.strategy_options.Load.defer
+sqlalchemy.orm.strategy_options.Load.immediateload
+sqlalchemy.orm.strategy_options.Load.joinedload
+sqlalchemy.orm.strategy_options.Load.lazyload
+sqlalchemy.orm.strategy_options.Load.load_only
+sqlalchemy.orm.strategy_options.Load.noload
+sqlalchemy.orm.strategy_options.Load.raiseload
+sqlalchemy.orm.strategy_options.Load.selectin_polymorphic
+sqlalchemy.orm.strategy_options.Load.selectinload
+sqlalchemy.orm.strategy_options.Load.subqueryload
+sqlalchemy.orm.strategy_options.Load.undefer
+sqlalchemy.orm.strategy_options.Load.undefer_group
+sqlalchemy.orm.strategy_options.Load.with_expression
+
+# unclear problems
+sqlalchemy.sql.elements.quoted_name.lower
+sqlalchemy.sql.elements.quoted_name.upper
+sqlalchemy.sql.expression.quoted_name.lower
+sqlalchemy.sql.expression.quoted_name.upper
+sqlalchemy.sql.quoted_name.lower
+sqlalchemy.sql.quoted_name.upper