Hotfix/sangshuduo/td 4025 fix travis ci broken (#6375)

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

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

change focal to bionic.

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

install python3.8

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

install python3.8 and pip, setuptools

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

install python3.8, and install pip and setuptools

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

modify smoketest.sh to python3.8

* fix timezone build error with clang/linux.
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 =================//