HiGHS, google-glog, abseil, protobuf, re2 required to be built with c++20, gcc12

release 9.10 has issues with abseil-cpp making use of VLOG_IS_ON, so we used tag v99bugfix

should switch to 9.11 when it is released

patches are submitted on https://github.com/google/or-tools/issues/4359 and may get incorporated by 9.11