ci(docker): mount managed_transform_buffer in universe image

[amadeuszsz]

Description

After recent managed_transform_buffer PRs, local docker build fails for me:

#106 655.1 Starting >>> autoware_pointcloud_preprocessor                                                                                                                                                                                                                           
#106 660.0 --- stderr: autoware_pointcloud_preprocessor                                                                                                                                                                                                                            
#106 660.0 CMake Error at /opt/ros/humble/share/ament_cmake_target_dependencies/cmake/ament_target_dependencies.cmake:77 (message):                                                                                                                                                
#106 660.0   ament_target_dependencies() the passed package name                                                                                                                                                                                                                   
#106 660.0   'managed_transform_buffer' was not found before                                                                                                                                                                                                                       
#106 660.0 Call Stack (most recent call first):                                                                                                                                                                                                                                    
#106 660.0   CMakeLists.txt:39 (ament_target_dependencies)                                                                                                                                                                                                                         
#106 660.0                                                                                                                                                                                                                                                                         
#106 660.0                                                                                                                                                                                                                                                                         
#106 660.0 ---                                                                                                                                                                                                                                                                     
#106 660.0 Failed   <<< autoware_pointcloud_preprocessor [4.92s, exited with code 1]                                                                                                                                                                                               
#106 ...                                                                                                                                                                                                                                                                           

Looks like I forgot to add external repository to multi-stage build process.

How was this PR tested?

Notes for reviewers

I'm not sure if actual layer is the most appropriate. Please feel free to move it to another layer if needed.

Effects on system behavior

None.

[github-actions]

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[youtalk]

LGTM