Bugfix use old style include directories for filters

[Ryanf55]

Purpose

Use old-style CMake variables as a patch till this upstream issue makes it into humble binaries: ros/filters#70

Cause

https://github.com/ANYbotics/grid_map/pull/404/files#diff-217de7f0d7eec88dce2cada8716bd30748cf9ad20d1211c56501a2acb56666bbL28

This PR forgot to add the include directories from filters, probably because there were no targets. I'm not sure how it builds on rolling and not humble. This patch can be replaced with a proper target_link_libraries call soon.

Effect

It's blocking CI from passing in this PR: https://github.com/ANYbotics/grid_map/actions/runs/7943206475/job/21687293385?pr=440#step:6:25

Upstream variables

$ cat /opt/ros/rolling/share/filters/cmake/ament_cmake_export_include_directories-extras.cmake 
# generated from ament_cmake_export_include_directories/cmake/ament_cmake_export_include_directories-extras.cmake.in

set(_exported_include_dirs "${filters_DIR}/../../../include")

# append include directories to filters_INCLUDE_DIRS
# warn about not existing paths
if(NOT _exported_include_dirs STREQUAL "")
  find_package(ament_cmake_core QUIET REQUIRED)
  foreach(_exported_include_dir ${_exported_include_dirs})
    if(NOT IS_DIRECTORY "${_exported_include_dir}")
      message(WARNING "Package 'filters' exports the include directory '${_exported_include_dir}' which doesn't exist")
    endif()
    normalize_path(_exported_include_dir "${_exported_include_dir}")
    list(APPEND filters_INCLUDE_DIRS "${_exported_include_dir}")
  endforeach()
endif()

You can see the variable we need to use is filters_INCLUDE_DIRS

[srmainwaring]

LGTM. Verified on macOS.

[Ryanf55]

@Mergifyio backport iron

[mergify]

backport iron

✅ Backports have been created

• #446 Bugfix use old style include directories for filters (backport #442) has been created for branch iron

[Ryanf55]

@Mergifyio backport humble

[mergify]

backport humble

✅ Backports have been created

• #447 Bugfix use old style include directories for filters (backport #442) has been created for branch humble