Fix starrocks expression partition sql parse:
before fix starrocks parser always expect a "(" after we defined partition columns, but starrocks support expression partition now, this will cause parse failure when we create expression partition table:https://docs.starrocks.io/docs/table_design/data_distribution/expression_partitioning/#partitioning-based-on-the-column-expression-since-v31

so I fixed support for expression partition.

Also fixed some exist unit tests in StarRocksCreateTableParserTest