Plan to refactor DistSQL's RAL syntax

[lanchengx]

Aim Move the grammar related to global rules in the RAL grammar to the corresponding global rules module.

Reference feature module

[TeslaCN]

Hi @lanchengx Any update here?

[yx9o]

@RaigorJiang Hi, I would like to be involved in this work.

[RaigorJiang]

@yx9o Thank you, let me explain, this task needs to add the corresponding distsql module under global rule, you may need to add new SPI, like EncryptDistSQLStatementParserFacade

[yx9o]

Ok, I will refer to the feature module above.

[RaigorJiang]

@yx9o Completed, thank you!