OAI 5GC seems to have a bug, and occasionally might send a PDU session
setup request without having sent a UE context setup request, resulting
in no security context activated for a UE. This lead to an assertion in
rrc_gNB_process_e1_bearer_context_setup_resp().

To prevent the gNB from stopping, check if security is active before
triggering PDU sessions. If not, the gNB will reject PDU sessions.

Integration: `2024.w29`

See merge request oai/openairinterface5g!2867

* !2854 Fix NSA test
* !2715 Aerial multi l2
* !2798 CI: Create Iperf2 unidirectional function
* !2859 Switch to BWP where RA is configured when Msg3 contains MAC CE for C-RNTI
* !2861 7.2 xran: notification generation code in ru_thread excluded from compilation
* !2853 Cleanup executables focusing on NR UE
* !2860 Fix segfault in SRS modulation when ue-nb-ant-tx (fp) does not match UE capabilities
* !2863 Add configuration for CBRS RU
* !2749 immediately reuse UL/DL HARQ ID and don't wait for feedback if disable_harq == 1

* number of configured SRS antenna ports M <= N (number of physical antenna ports)

gNB: refactor code to handle end of using a specific HARQ process - finish_nr_dl_harq() and finish_nr_ul_harq()

* the mismatch between UE capabilities, passed to PHY by NFAPI PDU, and --ue-nb-ant-tx
  causes a segfault in SRS modulation
* issue with indexing txdataF[p_index], which fails due to an out-of-bounds access
  since first dimension of txdataF is sized based on ue->frame_parms.nb_antennas_tx
* N_ap used in SRS modulation is based on the number of antenna ports
  in the SRS configuration (srs_config_pdu->num_ant_ports)

sched_ul_bytes is reduced already in case the last HARQ round fails through handle_nr_ul_harq() -> abort_nr_ul_harq().
Therefore, the reduction in nr_rx_sdu() is wrong, and btw. it wrongly assumes the max. UL HARQ rounds to 4.
So simply remove this peace of code in nr_rx_sdu().

sched_ul_bytes tracks the volume of in-flight data.
When data is successfully received, sched_ul_bytes is decreased in nr_rx_sdu().
In case of reusing HARQ processes, the tb_size stored there is not correct.
Therefore use the actual SDU size instead.

gNB: add config file option "disable_harq" and set pdsch_servingcellconfig->ext3->downlinkHARQ_FeedbackDisabled_r17 accordingly

Don't break after first occurence of status template (interval "0.0- 1.0 sec").
With this modification we get final result, which is at the last line of log
(for interval "0.0-30.2 sec").

Remove code related to "rfsim4g_enb_fembms" testcase from Iperf_Module() -
replaced by Iperf2_Unidir(). Use copyin() for both remote and local
commands - no need to check if running on localhost anymore.
Create directory for log collection on executor node -
used for log collection in pipelines running on localhost.
Copy the iperf3 report to the executor machine for log collection.
The report needs to be copied to two different directories to ensure
proper log collection across all pipelines. Using absolute paths
ensures compatibility with both remote and local commands.

Add new function to run iperf v2 test. Supports testing with 1 UE, unidirectional traffic.
Currently used in RFSim-4G, FeMBMS testcase.

oaisim_flag, dumpframe, rx_input_level_dBm, emulate_rf