Feature/sangshuduo/td 3408 taosdemo async query (#5730)

* [TD-3408]<feature>: taosdemo support async query.

* [TD-3408]<feature>: taosdemo support async query.

refactor

* [TD-3408]<feature>: taosdemo support async query.

refactor 2

* [TD-3408]<feature>: taosdemo support async query.

refactor 3

* [TD-3408]<feature>: taosdemo support async query.

refactor 4

* [TD-3408]<feature>: taosdemo support specified sql more than one line.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>