chore(pointcloud_preprocessor): suppress CGAL warning

[TomohitoAndo]

Signed-off-by: Tomohito Ando tomohito.ando@tier4.jp

Description

Added CGAL_DATA_DIR variable to suppress warning from CGAL.

Without this variable, CGAL will show following warning because of CGAL::data_file_path function.
CGAL::data_file_path is not used in Autoware, so I added temporary value of ".".

Starting >>> pointcloud_preprocessor
[Processing: pointcloud_preprocessor]                             
[Processing: pointcloud_preprocessor]                                     
[Processing: pointcloud_preprocessor]                                       
--- stderr: pointcloud_preprocessor                                          
CMake Warning at /usr/lib/x86_64-linux-gnu/cmake/CGAL/CGALConfig.cmake:92 (message):
  CGAL_DATA_DIR cannot be deduced, set the variable CGAL_DATA_DIR to set the
  default value of CGAL::data_file_path()
Call Stack (most recent call first):
  CMakeLists.txt:15 (find_package)

---
Finished <<< pointcloud_preprocessor [1min 41s]

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[codecov]

Codecov Report

Base: 10.78% // Head: 10.78% // No change to project coverage 👍

Coverage data is based on head (26f41d6) compared to base (897794a).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2156   +/-   ##
=======================================
  Coverage   10.78%   10.78%           
=======================================
  Files        1186     1186           
  Lines       84842    84842           
  Branches    19899    19899           
=======================================
  Hits         9149     9149           
  Misses      66002    66002           
  Partials     9691     9691           

Flag	Coverage Δ		*Carryforward flag
differential	0.00% <ø> (?)
total	10.76% <ø> (ø)		Carriedforward from 897794a

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