[SPARK-14086][SQL] Add DDL commands to ANTLR4 parser

#### What changes were proposed in this pull request?

This PR adds all the current Spark SQL DDL commands to the new ANTLR 4 based SQL parser.

I have found a few inconsistencies in the current commands:
- Function has an alias field. This is actually the class name of the function.
- Partition specifications should contain nulls in some commands, and contain `None`s in others.
- `AlterTableSkewedLocation`: Should defines which columns have skewed values, and should allow us to define storage for each skewed combination of values. We currently only allow one value per field.
- `AlterTableSetFileFormat`: Should only have one file format, it currently supports both.

I have implemented all these comments like they were, and I propose to improve them in follow-up PRs.

#### How was this patch tested?

The existing DDLCommandSuite.

cc rxin andrewor14 yhuai

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #12011 from hvanhovell/SPARK-14086.