feat: enable multithreading for the control container (#6666)

Signed-off-by: tomoya.kimura <tomoya.kimura@tier4.jp>

Author: tkimura4

launch/tier4_control_launch/launch/control.launch.py

@@ -429,7 +429,7 @@ def add_launch_arg(name: str, default_value=None, description=None):
 
     # component
     add_launch_arg("use_intra_process", "false", "use ROS 2 component container communication")
-    add_launch_arg("use_multithread", "false", "use multithread")
+    add_launch_arg("use_multithread", "true", "use multithread")
     set_container_executable = SetLaunchConfiguration(
         "container_executable",
         "component_container",