postgresql dialect table options

postgresql dialect table options

Support for storage parameters in ``CREATE TABLE`` using the ``WITH``
clause has been added. The ``postgresql_with`` dialect option of
:class:`_schema.Table` accepts a mapping of key/value options.

The PostgreSQL dialect now support reflection of table options, including
the storage parameters, table access method and table spaces. These options
are automatically reflected when autoloading a table, and are also
available via the :meth:`_engine.Inspector.get_table_options` and
:meth:`_engine.Inspector.get_multi_table_optionsmethod` methods.

Fixes: #10909
Closes: #12584
Closes: #12684
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/12584
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/12684
Pull-request-sha: a660459de9adcedb2d12eac72450747c04792bcd

Change-Id: I33e3d8b8eb0c02530933cb124e3d375ca4af7db2