[TD-6087]<merge> merge distinct to master

[TD-5765]<hotfix>:check max length when alter tag value

[TD-6044]<hotfix>: WAL compatibility since v2.1.5.0

[TD-5998]<fix>:_block_dist() only support tables, not subqueries

[ci skip] update daily performance script

[TD-5935] <test> add case for TD-5935

* [TD-3197]<fix>: taosdemo and taosdump coverity scan issues.

* exit if read sample file failed.

* fix converity scan issue.

* fix coverity scan issue.

* fix coverity scan memory leak.

* fix resource leak reported by coverity scan.

* fix taosdemo coverity scan issue.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

Feature/master1

[TD-6043]fix interp stable query issue

* [TD-5702]<fix>: taosdemo remove memory operation.

* [TD-5702]<fix>: taosdemo remove memory operation.

* add remainderBufLen to check row data generation.

* row data generation with remainder buffer length checking.

* git checkout --patch hotfix/sangshuduo/TD-5702-taosdemo-remove-memop taosdemo.c
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

fixed realloc can cause memory leak

speed up drone in master

[TD-6048]fix stddev query condition column issue

* cherry pick from develop branch.

* cherry pick 54813175

* [TD-5872]<fix>: taosdemo stmt csv perf improve.

* rand func back to early impl.

* fix windows/mac compile error.

* cherry pick from develop branch.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

[TD-6006]<test> query where by column with no quotes

[ci skip]<test>: reduce data insertion time

fixed huffman tree memory leak