TS-899

[TD-14342]<fix> fix error if nchar condition in subquery like "select * from (select * from table) where nchar = '0'"

* restore .gitmodules

* Revert "[TD-13408]<test>: move tests directory out"

This reverts commit 7db7bd9337cedc4cd0e3f3b16618b97d09791eaa.

* revert to make tests back

* immigrate file change in stand-alone repo to TDengine

* remove tests repository checkout
Co-authored-by: Ntangfangzhi <fztang@taosdata.com>

* [TD-13408]<test>: move tests directory out

* restore Jenkinsfile due to tests dir removal

* add --remote parameter to git submodule update

* git reset hard before checkout to branch

* call git submodule update for some submodules

* remove tests directory before checkout due to conflict

* as all branches remove tests, no need to remove it in script
Co-authored-by: Ntangfangzhi <fztang@taosdata.com>

[TD-1026](query,insert,other,connector,tools):fix test case so that it can generate new table name when tablename is all lower

[TD-1026](query,insert,other,connector,tools):fix test case so that it can generate new table name when tablename is all lower

* [TD-11776]<fix>change taosdemo to taosBenchmark

* change python test taosdemo

* fix

* change json back

* update taos-tools

* modify test case

* change to taosBenchmark

* update taos-tools

* update taos-tools

* update taos-tools

* revert pr

* revert

* revert

* update taos-tools

* update taos-tools with pressure mode fix

* fix test case

* update

* modify test case

* fix

* remove taosdemo test case
Co-authored-by: Shuduo Sang <sangshuduo@gmail.com>

This reverts commit cdac20c7.