* [TD-4296]<fix>: taosdemo sub keepProgress.

* make print sqlcount quiet.

* [TD-4296]<fix>: taosdemo subscribe keepprogress.

specified query topic thread safe.

* cherry pick from master branch.

* cherry pick from master branch.

* fix compile warning for mac.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>