[TD-5474]<fix> fix runtime error

[TD-5507]fix no table meta issue

[TD-5484]<fix>:tag nchar/binary length exceed limit error when alter table add tag

[TD-5485]<fix>:fix memory error due to uninitialized pointer value

[TD-848] <docs>: fix description about SPREAD return type.

[TD-5471] <docs>: fix description about parameter of STATE window.

* [TD-5489]<fix>: use jdbc specified version number in cmake/CMakeList.txt and src/connector/jdbc/CMakeList.txt

* change version number in deploy-pom.xml

[TD-5237]<feature>:add additional info for "show queries" output

[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