Fix memory leak in nr_rrc_ue_decode_NR_BCCH_DL_SCH_Message

* bcch_message is malloced by ASN.1 decoder and needs to be always freed after use along with its contents

> Direct leak of 64 byte(s) in 1 object(s) allocated from:
   >0 0x7ffff74b4a57 in __interceptor_calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:154
   >1 0x555557737ecd in SEQUENCE_decode_uper /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/constr_SEQUENCE_uper.c:37
   >2 0x555557746f81 in uper_decode /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/uper_decoder.c:83
   >3 0x5555577471fe in uper_decode_complete /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/uper_decoder.c:16
   >4 0x555556f8b1c9 in nr_rrc_ue_decode_NR_BCCH_DL_SCH_Message /openair2/RRC/NR_UE/rrc_UE.c:732
   >5 0x555556fbc365 in rrc_nrue /openair2/RRC/NR_UE/rrc_UE.c:1775
   >6 0x555556fc4c2e in rrc_nrue_task /openair2/RRC/NR_UE/rrc_UE.c:1718
   >7 0x7ffff5e94ac2 in start_thread nptl/pthread_create.c:442

openair2/RRC/NR_UE/rrc_UE.c

@@ -776,13 +776,13 @@ static int8_t nr_rrc_ue_decode_NR_BCCH_DL_SCH_Message(NR_UE_RRC_INST_t *rrc,
         LOG_I(NR_RRC, "[UE %ld] Decoding SI\n", rrc->ue_id);
         NR_SystemInformation_t *si = bcch_message->message.choice.c1->choice.systemInformation;
         nr_decode_SI(SI_info, si);
-        SEQUENCE_free(&asn_DEF_NR_BCCH_DL_SCH_Message, (void *)bcch_message, 1);
         break;
       case NR_BCCH_DL_SCH_MessageType__c1_PR_NOTHING:
       default:
         break;
     }
   }
+  SEQUENCE_free(&asn_DEF_NR_BCCH_DL_SCH_Message, bcch_message, ASFM_FREE_EVERYTHING);
   VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_BCCH, VCD_FUNCTION_OUT );
   return 0;
 }