fix build errors about nrUE
c-plane is ok

Merge branch 'develop_SA_rfsim_for_F1' of http://10.37.193.133:8000/gitlab/vran/OAI-5GNR into develop_SA_rfsim_for_F1

Conflicts:
        cmake_targets/CMakeLists.txt
        openair1/PHY/NR_UE_ESTIMATION/nr_ue_measurements.c
        openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_decoding.c
        openair1/SCHED_NR/phy_procedures_nr_gNB.c
        openair2/RRC/NR/rrc_gNB.c
        openair2/RRC/NR_UE/rrc_UE.c
        openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.c
        openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c
        openair2/LAYER2/NR_MAC_UE/main_ue_nr.c
        openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c
        openair2/LAYER2/NR_MAC_gNB/main.c
        openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
        openair2/LAYER2/NR_MAC_UE/nr_ra_procedures.c
        openair2/LAYER2/NR_MAC_UE/nr_ue_dci_configuration.c
        openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c
        openair2/LAYER2/nr_pdcp/nr_pdcp_entity_drb_am.c

CI: fix flexran-rtc build Xenial

See merge request oai/openairinterface5g!1007

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

add rrc_gNB_process_f1_setup_req

Conflicts:
	openair2/GNB_APP/gnb_config.c
	openair2/RRC/NR/rrc_gNB.c

Initialize F1AP

modify some issues
add f1ap ue context procedure

add DU_handle_DL_NR_RRC_MESSAGE_TRANSFER

MR991: Remove hack in LTE PDCP for noS1 mode  
- Removes a hack which was used when LTE PDCP was used for NR in noS1 mode

MR993: UL and DL fixes LDPC short codewords 
- Fix UL & DL LDPC decoding for short LDPC code, e.g. Z_c is not multiple of 8
- Fix DLSCH data transmission with multiple DMRS symbols per slot
- small TA fixes on OAI 5G NR UE
- Implemented CQI measurement at NR UE
- NR UE cleanup 

MR1000: doc: fix build directory in BASIC_SIM.md

 Conflicts:
	openair2/RRC/NR/nr_rrc_proto.h
	openair2/RRC/NR/rrc_gNB.c
	openair2/RRC/NR_UE/rrc_UE.c
	openair2/RRC/NR_UE/rrc_defs.h
	openair3/NGAP/ngap_gNB_nas_procedures.c