Support new target export template introduced with CMake 3.24 (backport #395)

[mergify]

This is an automatic backport of pull request #395 done by Mergify.

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[clalancette]

CI:

• Linux
• Linux-aarch64
• Windows

[clalancette]

The failed tests on Windows seem unrelated to this PR, so going ahead and merging.

[tonynajjar]

Hi, I'm suspecting that this PR is causing this issue and a similar one I'm having:

Starting >>> bondcpp
--- stderr: bondcpp                            
CMake Error at /code/ros2_ws/install/bond/share/bond/cmake/ament_cmake_export_targets-extras.cmake:18 (message):
  Failed to find exported target names in
  '/code/ros2_ws/install/bond/share/bond/cmake/bond__rosidl_generator_cExport.cmake'
Call Stack (most recent call first):
  /code/ros2_ws/install/bond/share/bond/cmake/bondConfig.cmake:41 (include)
  CMakeLists.txt:13 (find_package)

I'm not so well versed in cmake. Could you please check if this could be related? Thanks

[clalancette]

I'm not so well versed in cmake. Could you please check if this could be related? Thanks

It should be easy enough to test; revert this patch, and try it out. Does it work then?

[tonynajjar]

Fair enough. After further investigation, I think this is actually not the problem, it's the fix. The problematic systems have cmake 3.24 already and lack this backport. Anyway nothing to do here, sorry for the false alarm