Refactor system-test dir structure and add stability test (#7530)

system-test/performance-testcases/colo-cpu-only-perf.yml

@@ -0,0 +1,16 @@
+steps:
+  - command: "system-test/testnet-automation.sh"
+    label: "COLO performance testnet CPU only"
+    env:
+      UPLOAD_RESULTS_TO_SLACK: "true"
+      CLOUD_PROVIDER: "colo"
+      TESTNET_TAG: "colo-perf-cpu-only"
+      ENABLE_GPU: "false"
+      RAMP_UP_TIME: 0
+      TEST_DURATION_SECONDS: 600
+      NUMBER_OF_VALIDATOR_NODES: 4
+      NUMBER_OF_CLIENT_NODES: 2
+      CLIENT_OPTIONS: "bench-tps=2=--tx_count 20000 --thread-batch-sleep-ms 250"
+      ADDITIONAL_FLAGS: ""
+    agents:
+      - "queue=colo-deploy"