[TD-5797]<feature> support multi distinct 

Signed-off-by: NKeli <root@keli.im>

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

* add remainderBufLen to check row data generation.

* row data generation with remainder buffer length checking.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

[TD-5931]<fix>:add empty table

[TD-5610]<fix> resp detailed info of invalidfqdn

Feature/query

[TD-5065] <docs>: add nanosecond support.

Test/td 5460 d1

[TD-6038]<test>query with in combined with and filter

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

[TD-6012]<fix>: fixed no sql recordings via http while httpEnableRecordSql was on

remove join.sim [ci skip]

speed up drone CI

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

* refactor stmt functions.

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

* rand func back to early impl.

* fix windows/mac compile error.

* fix empty tag sample.

* [TD-5873]<test>add stmt’performance taosdemo testcase
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>
Co-authored-by: tomchon <haoran920c@163.com>

Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

[TD-5930]<fix>:_block_dist initialize client merge buffer with max steps

[TD-5861]<feature>:move log.dn to http plugins

[TD-5863]fix orderby error msg

merge from master

Docs/update latest feature

[TD-5835]<test>: add test case for daily performance test

remove case[ci skip]