* [Feature-9467][DataSource] add DAMENG (达梦) data source * [Feature-9467] add DM datasource doc (Issue #9467) * [Feature-9467] add DM IDataBaseOptionKeys * [Feature-9467] add DM DataSource: DmDataSourceChannelFactoryTest remove testGetDmConnection method * [Feature-9467] modification package dm to dameng; * [Feature-9467] add Dameng DmJdbcDriver18 License * [Feature-9467] add DM DataSource: remove DruidDataSourceClient Co-authored-by: lenian <yuenian@mananacare.com>