Read PDU session configuration and request

Use the new PDU session configuration functionality of the parent
commit. It is now possible to request multiple PDU sessions, and to
request specific PDU session types. While the new uicc0.pdu_sessions is
preferred, it is still possible to use the "legacy"
uicc0.dnn/nssai_sst/nssai_sd.

The old parameters --default-pdu-id and --extra-pdu-id are not allowed
anymore, as it is possible to manually define this in the UE
configuration. Correspondingly, fix the use of those options, where
applicable.

Note: since the default_pdu_id is changed to -1, all interface names
will have pX to interface names appended (oaitun_ue1pX). The next commit
will correct this.

ci-scripts/conf_files/nrue.uicc.2pdu.conf

@@ -0,0 +1,11 @@
+uicc0 = {
+  imsi = "208990100001100";
+  key = "fec86ba6eb707ed08905757b1bb44b8f";
+  opc= "C42449363BBAD02B66D16BC975D77CC1";
+  pdu_sessions = (
+    { id = 1; dnn = "oai"; nssai_sst = 1; },
+    { id = 2; dnn = "oai"; nssai_sst = 1; }
+  )
+}
+
+thread-pool = "-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1"

ci-scripts/yaml_files/5g_rfsimulator_u0_25prb/docker-compose.yaml

@@ -149,7 +149,7 @@ services:
             - NET_RAW    # for ping
         environment:
             USE_ADDITIONAL_OPTIONS: --rfsim -r 25 --numerology 0 --uicc0.imsi 208990100001100 --band 66 -C 2152680000 --CO -400000000 --ssb 48
-                                    --rfsimulator.serveraddr 192.168.71.141 --extra-pdu-id 2 --log_config.global_log_options level,nocolor,time
+                                    --rfsimulator.serveraddr 192.168.71.141 --log_config.global_log_options level,nocolor,time
                                     --telnetsrv --telnetsrv.shrmod ciUE --telnetsrv.listenaddr 192.168.71.150 --telnetsrv.listenport 8091
             ASAN_OPTIONS: detect_leaks=0:detect_odr_violation=0
         depends_on:
@@ -160,7 +160,7 @@ services:
         devices:
              - /dev/net/tun:/dev/net/tun
         volumes:
-            - ../../conf_files/nrue.uicc.conf:/opt/oai-nr-ue/etc/nr-ue.conf
+            - ../../conf_files/nrue.uicc.2pdu.conf:/opt/oai-nr-ue/etc/nr-ue.conf
         healthcheck:
             test: /bin/bash -c "pgrep nr-uesoftmodem"
             start_period: 10s