[td-5407]<enhance>: add a local buffer for super table vgroup id list to improve the query performance.

[TD-4812] complete robust cluster test script

change config name in taos.cfg

* [TD-5445]<fix>: taosdemo bug for stmt interface with sample data.

* refactoring some macros.

* fix mac compile error.

* [TD-5479]<fix>: taosdump -S -E does not work.

* taosdemo support timestamp step from command line.

close taosdemo-testcase

Dev/chr

Release/ver 2.1.5.0

[TD-5429]<hotfix>:executing group by test suite throws uninitialized semaphore error

[TD-5431]<fix>:fix hashDistinct bug about var_data_type value keys

[TD-5449]<fix>:adapt max sql string length for maxium columns

[TD-5459]<fix>: fix sql parse core error

[TD-5454]<fix>: fix arm32 qDebug error