Add support for Ubuntu 22.04 and fix a minor bug for OpenCL

[shu-gong]

Hi developers,

Currently, CustusX cannot be compiled with gcc/g++ 11, so I added notes to the install/platforms/ubuntu/ubuntu2204_packages.sh. The version of Boost is controlled in this shell (libboost1.71-dev).

In order to use FAST module, we need to add cx_initialize_opencl() to activate OpenCL.

Thanks

[olevs]

Dear Shu,

Thank you for your interest in CustusX, and contribution. It's great that you have been testing CustusX for Ubuntu 22.04! The next CustusX release, and nightly builds are only going to support Ubuntu 20.04 for now, but it's good to know that only small changes are needed for Ubuntu 22.04. We probably won't add the ubuntu2204_packages.sh file before we're ready to use it ourselves, but it's great to have it here as a reference.

Yes, in order to use the FAST library with CustusX you will need to use cx_initialize_opencl(). We have stopped building FAST with CustusX, to reduce the number of dependencies. Only the Fraxinus application (based on CustusX) is using FAST, and this may possibly switch to using pyFAST in the future.

Best Regards,
Ole Vegard