Report last tower distance and add partition testcase (#7929)

automerge

system-test/partition-testcases/colo-partition-once-then-stabilize.yml

@@ -0,0 +1,19 @@
+steps:
+  - command: "system-test/testnet-automation.sh"
+    label: "Colo - CPU Only - 1 minute partition then 5 minute stabilization"
+    env:
+      UPLOAD_RESULTS_TO_SLACK: "true"
+      CLOUD_PROVIDER: "colo"
+      TESTNET_TAG: "colo-perf-cpu-only"
+      NUMBER_OF_VALIDATOR_NODES: 4
+      ENABLE_GPU: "false"
+      NUMBER_OF_CLIENT_NODES: 2
+      CLIENT_OPTIONS: "bench-tps=2=--tx_count 15000 --thread-batch-sleep-ms 250"
+      ADDITIONAL_FLAGS: ""
+      APPLY_PARTITIONS: "true"
+      NETEM_CONFIG_FILE: "system-test/netem-configs/partial-loss-three-partitions"
+      PARTITION_ACTIVE_DURATION: 60
+      PARTITION_INACTIVE_DURATION: 300
+      PARTITION_ITERATION_COUNT: 1
+    agents:
+      - "queue=colo-deploy"