Add CI builds using clang-19 and clang-20#7304

TheMarex merged 2 commits intoProject-OSRM:masterProject-OSRM/osrm-backend:masterfrom

MarcelloPerathoner:CI-build-add-clang-19-20MarcelloPerathoner/osrm-backend:CI-build-add-clang-19-20Copy head branch name to clipboard