Draft: (build): fetch new conan packages

Description

Root CMakeLists.txt

/cmake/conan/conan.cmake

• Update conan.cmake file to latest version (v0.15)
• Update the find_package(CUDA) by FindCUDAToolkit
• Check that the correct CUDA version is used
• Remove the clone of conan-config.git with the settings.yml and CONAN_DISTRO
• Use conan generator find_package / find_package_multi

/cmake/conan/conan-deps.cmake

• Delete CONAN_COMMON
• Update with latest version of packages, add new packages if needed

/cmake/build/flags.cmake

• Remove part using the common.py and include the conan package that defines compilation flags (conan package: sight-flags, file: flags.cmake).

Misc

Closes #601 (closed)

How to test it?

Build everything, launch all tutorials, launch all applications