* [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.

* fix tcsetattr and getchar return value determination bug.

* fix coverity scan issue.

* fix two more coverity scan issues.

* fix stmt batch coverity scan issue.

* change to portable format.

* fix coverity scan issue

* [TD-10578]<fix>: taosdemo rest interface slow.

* fix missed 200

* fix taosdemo coverity scan issue.

* fix taosdemo coverity scan issue.

* fix taosdemo testcase for restful result.

* make master taosdemo rest logic same as develop

* modify taosdemo param to reflect current tbname prefix.

* remove chmod to make script keep same mod.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* 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.

* merge with develop branch.

* rename MAX_SAMPLES_ONCE_FROM_FILE to reflect reality.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-5398]<fix>: taosdemo 4096 columns table creation failed.

* change column name prefix from col to c for maxium column number to fix buffer length.

* use accurate buffer length.

* fix test case for column name be shorter.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* cherry pick from develop branch.

* [TD-5136]<feature>: taosdemo simulate real senario.

* update test case according to taosdemo change

* adjust range of semi-random data.

* [TD-5136]<feature>: taosdemo simulate real senario.

* update test case according to taosdemo change

* [TD-3906]<fix>: taosdemo back to 4 INT columns.

* [TD-3906]<fix>: taosdemo back to 4 columns.

test case need change correspondingly.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-3607] <fix>: fix taosdemo buffer overflow.

* [TD-3607] <fix>: taosdemo buffer overflow.

add tmp buffer.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix data generation.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix normal table writting.

* [TD-3607] <fix>: taosdemo buffer overflow.

remove tail spaces.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix taosdemo alter table test case.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix taosdemo alter table case.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

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

* [TD-3197] <fix>: fix taosdemo coverity scan issue.

fix subscribeTest pids uninitialized.

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

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

check super tbl info pointer.

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

move sub tbl query thread join into loop

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

remove unused variable

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

use more secure random library

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

use strncpy for more safe

* [TD-3197] <fix>: fix taosdemo coverity scan issue.

replace arc4random with rand().

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

check stb info pointer for start time

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

fix strcpy vulnerability

* [TD-3197] <fix>: fix taosdemo coverity scan issue.

modify taosdemoTest2. try to check database continously.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

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