Fix field support for CHARACTER SET & COLLATE

[cfebs]

Fixes two problems with CHARACTER SET & COLLATE

1. Neither CHARACTER SET or COLLATE would actually be set properly on the resulting table definitions.
2. Both CHARACTER SET & COLLATE would be required for the CharacterColumn::getPhpCode to include it in php code generation
   • According to the grammar, they can be used individually

Changes:

• src/Processor/CreateProcessor.php The change to getTextDefinitionColumn allows the values parsed from sql to be passed to Column generation functions.
• src/Schema/Column/CharacterColumn.php generate each function arg individually

Added an integration test to the create table parser just for an easy add (CreateProcessor::getDefinitionColumn is private)

cc @aaronm67