Hotfix/sangshuduo/td 4025 fix travis ci broken for develop (#6376)

* [TD-4025]<fix>: travis ci broken due to valgrind dependency missed.

modify smoketest.sh to python3.8

* [TD-4025]<fix>: travis ci broken due to ubuntu 20.04 repo issue.

* [TD-4025]<fix>: travis ci broken due to ubuntu 20.04 repo issue.

* [TD-4025]<fix>: travis ci broken due to ubuntu 20.04 repo issue.

* [TD-4025]<fix>: travis ci broken due to valgrind dependency missed.

change focal to bionic.

* [TD-4025]<fix>: travis ci broken due to ubuntu 20.04 repo issue.

cherry pick from master.

* don't check maven on windows for appveyor.

* fix timezone build error with clang/linux.

* add .appveyor.yml back.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

src/os/src/detail/osTime.c

@@ -43,7 +43,7 @@
  */
 int64_t user_mktime64(const unsigned int year0, const unsigned int mon0,
 		const unsigned int day, const unsigned int hour,
-		const unsigned int min, const unsigned int sec, int64_t timezone)
+		const unsigned int min, const unsigned int sec, int64_t time_zone)
 {
   unsigned int mon = mon0, year = year0;
 
@@ -61,7 +61,7 @@ int64_t user_mktime64(const unsigned int year0, const unsigned int mon0,
   res  = res*24;
   res  = ((res + hour) * 60 + min) * 60 + sec;
 
-  return (res + timezone);
+  return (res + time_zone);
 }
 
 // ==== mktime() kernel code =================//