[TD-6169]<fix>: windows dll client can not quit.

src/client/src/tscSystem.c

@@ -122,6 +122,10 @@ int32_t tscAcquireRpc(const char *key, const char *user, const char *secretEncry
 
 void taos_init_imp(void) {
   char temp[128] = {0};
+
+  // In the APIs of other program language, taos_cleanup is not available yet.
+  // So, to make sure taos_cleanup will be invoked to clean up the allocated resource to suppress the valgrind warning.
+  atexit(taos_cleanup);
   
   errno = TSDB_CODE_SUCCESS;
   srand(taosGetTimestampSec());
@@ -197,10 +201,6 @@ void taos_init_imp(void) {
 
   tscRefId = taosOpenRef(200, tscCloseTscObj);
 
-  // In the APIs of other program language, taos_cleanup is not available yet.
-  // So, to make sure taos_cleanup will be invoked to clean up the allocated resource to suppress the valgrind warning.
-  atexit(taos_cleanup);
-
   tscDebug("client is initialized successfully");
 }