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
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