Integration branch 2023 week 3: !1880 Fix to schedule NR SRS K2 slots in advance !1885 cleaning only !1912 Correctly encode DNN length/APN name !1913 bugfix: initialize all variables of the 'context' thing !1914 bugfix: avoid a crash when oai_exit is set !1915 remove patch in install_simde_from_source() !1882 CI: Add more RFsim tests, cleanup