Hotfix/sangshuduo/td 3197 taosdemo coverity scan for master (#8324)

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

src/kit/taosdemo/taosdemo.c

@@ -1886,12 +1886,6 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
                         arguments->disorderRatio, 50);
                 arguments->disorderRatio = 50;
             }
-
-            if (arguments->disorderRatio < 0) {
-                errorPrint("Invalid disorder ratio %d, will be set to %d\n",
-                        arguments->disorderRatio, 0);
-                arguments->disorderRatio = 0;
-            }
         } else if ((0 == strncmp(argv[i], "-a", strlen("-a")))
                 || (0 == strncmp(argv[i], "--replica",
                         strlen("--replica")))) {