(CMake): Use modern CMake when using Eigen3
Description
Eigen provides native CMake support which allows the library to be easily used in CMake projects.
We need to correct our scripts.
Proposal
...
find_package (Eigen3 REQUIRED)
target_link_libraries (${FWPROJECT_NAME} Eigen3::Eigen)
...
It is maybe need to update eigen conan package and remove the copy of FindEigen*.cmake
.
https://git.ircad.fr/conan/conan-eigen/blob/stable/3.3.4/conanfile.py#L47