CI: deploy OpenShift-based 5GC through CoreNetwork, use in Ping/Iperf

- Use scripts to deploy OpenShift-based 5GC in ci_infra.yaml
- Use for oc-cn5g, oc-cn5g-20897, and oc-cn5g-20897-aerial2
  for (un)deployment, ping, iperf in relevant XML files
- Convert hardcoded IP addresses to %cn_ip%

ci-scripts/xml_files/container_sa_n310_nrue.xml

@@ -127,6 +127,7 @@
     <class>Ping</class>
     <desc>Ping: 20pings in 20sec</desc>
     <id>oai_ue_caracal</id>
+    <svr_id>oc-cn5g</svr_id>
     <ping_args>-c 20 %cn_ip%</ping_args>
     <ping_packetloss_threshold>1</ping_packetloss_threshold>
     <ping_rttavg_threshold>25</ping_rttavg_threshold>
@@ -136,6 +137,7 @@
     <class>Ping</class>
     <desc>Ping: 100pings in 20sec</desc>
     <id>oai_ue_caracal</id>
+    <svr_id>oc-cn5g</svr_id>
     <ping_args>-c 100 -i 0.2 %cn_ip%</ping_args>
     <ping_packetloss_threshold>1</ping_packetloss_threshold>
     <ping_rttavg_threshold>30</ping_rttavg_threshold>