Merge remote-tracking branch 'origin/refactor-nr-rrc-du' into integration_2023_w15

doc/SW_archi.md

executables/nr-cuup.c

openair1/SIMULATION/NR_PHY/dlsim.c

openair1/SIMULATION/NR_PHY/ulsim.c

openair2/GNB_APP/gnb_config.c

openair2/LAYER2/NR_MAC_UE/main_ue_nr.c

openair2/LAYER2/NR_MAC_gNB/config.c

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

openair2/LAYER2/NR_MAC_gNB/main.c

openair2/LAYER2/nr_pdcp/nr_pdcp.h

openair2/LAYER2/nr_pdcp/nr_pdcp_entity.h

openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.c

openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c

openair2/LAYER2/nr_rlc/nr_rlc_oai_api.h

openair2/RRC/LTE/rrc_defs.h

openair2/RRC/NR/L2_nr_interface.c

openair2/RRC/NR/MESSAGES/asn1_msg.c

openair2/RRC/NR/MESSAGES/asn1_msg.h

openair2/RRC/NR/nr_rrc_config.c