Data sources should implement this trait so that they can register an alias to their data source.
This allows users to give the data source alias as the format type over the fully qualified
A new instance of this class will be instantiated each time a DDL call is made.
The string that represents the format that this data source provider uses.
The string that represents the format that this data source provider uses. This is
overridden by children to provide a nice alias for the data source. For example:
override def shortName(): String = "parquet"