* aper_decode allocates memory for for local pointer `pdusessionTransfer`, in `decodePDUSessionResourceSetup`
* this memory seems not to be freed but its members are by:
  `ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_NGAP_PDUSessionResourceSetupRequestTransfer,pdusessionTransfer);`
  which btw in its header says: "AVOID using it in the application code; Use a safer ASN_STRUCT_RESET() instead"
* the following mem leak was detected by ASAN:

```
Direct leak of 72 byte(s) in 1 object(s) allocated from:
   *0 0x7ffff74b4a57 in __interceptor_calloc /src/libsanitizer/asan/asan_malloc_linux.cpp:154
   *1 0x55555cb306df in SEQUENCE_decode_aper /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/constr_SEQUENCE_aper.c:36
   *2 0x55555ca9fa28 in aper_decode /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/aper_decoder.c:78
   *3 0x55555b99bae6 in decodePDUSessionResourceSetup /openair2/RRC/NR/rrc_gNB_NGAP.c:273
   *4 0x55555b99fec2 in trigger_bearer_setup /openair2/RRC/NR/rrc_gNB_NGAP.c:357
   *5 0x55555b9b54bf in rrc_gNB_process_NGAP_PDUSESSION_SETUP_REQ /openair2/RRC/NR/rrc_gNB_NGAP.c:830
   *6 0x55555b936871 in rrc_gnb_task /openair2/RRC/NR/rrc_gNB.c:2428
   *7 0x7ffff5e94ac2 in start_thread nptl/pthread_create.c:442
```

* This commit replaces ASN_STRUCT_FREE_CONTENTS_ONLY with ASN_STRUCT_FREE, which will free the memory allocated for the entire struct and its members

* fill_DRB_configList_e1 is filling `DRB_configList->list` then passing to PDCP
* the contents of the struct are allocated but seem not to be freed
* the following mem leak was detected by ASAN

```
Direct leak of 32 byte(s) in 1 object(s) allocated from:
   *0 0x7ffff74b4c38 in __interceptor_realloc /src/libsanitizer/asan/asan_malloc_linux.cpp:164
   *1 0x55555caa6a3e in asn_set_add /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/asn_SET_OF.c:27
   *2 0x55555c8b8bb6 in fill_DRB_configList_e1 /openair2/LAYER2/nr_pdcp/cucp_cuup_handler.c:42
   *3 0x55555c8be6eb in e1_bearer_context_setup /openair2/LAYER2/nr_pdcp/cucp_cuup_handler.c:189
   *4 0x55555d329668 in cucp_cuup_bearer_context_setup_direct /openair2/RRC/NR/cucp_cuup_direct.c:31
   *5 0x55555b9a2c37 in trigger_bearer_setup /openair2/RRC/NR/rrc_gNB_NGAP.c:437
   *6 0x55555b9b54bf in rrc_gNB_process_NGAP_PDUSESSION_SETUP_REQ /openair2/RRC/NR/rrc_gNB_NGAP.c:830
   *7 0x55555b936871 in rrc_gnb_task /openair2/RRC/NR/rrc_gNB.c:2428
   *8 0x7ffff5e94ac2 in start_thread nptl/pthread_create.c:442
```

* using ASN_STRUCT_RESET to free the memory used by the members of the structure
  without freeing the structure pointer which is allocated on the stack

- if search fails, keeps increasing the rx gain (set by --ue-rxgain) by
  3 db until USRP max rx gain
- if initial sync is success, sets the rxgain to the value of
  (TARGET_RX_POWER (50) - pbch digital power in dB/RE)

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

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

* 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)