Merge branch 'update/mes24xx' into 'master'

Add metrics CPU/Memory for MES24xx

See merge request noc/noc!4155

sa/profiles/Eltex/MES24xx/snmp_metrics/cpu_load_1min.json

+{
+  "$metric": "CPU | Load | 1min",
+  "$type": "oid",
+  "oid": "1.3.6.1.4.1.35265.1.139.6.1.1.2.2.0"
+}

sa/profiles/Eltex/MES24xx/snmp_metrics/cpu_load_5min.json

+{
+  "$metric": "CPU | Load | 5min",
+  "$type": "oid",
+  "oid": "1.3.6.1.4.1.35265.1.139.6.1.1.2.3.0"
+}

sa/profiles/Eltex/MES24xx/snmp_metrics/cpu_usage.json

+{
+  "$metric": "CPU | Usage",
+  "$type": "oid",
+  "oid": "1.3.6.1.4.1.35265.1.139.6.1.1.2.1.0"
+}

sa/profiles/Eltex/MES24xx/snmp_metrics/memory_usage.json

+{
+  "$metric": "Memory | Usage",
+  "$type": "oid",
+  "oid": "1.3.6.1.4.1.2076.81.1.73.0"
+}
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