add system-reserved-compressible test

[qiliRedHat]

https://issues.redhat.com/browse/OCPNODE-3939

dynamic-system-reserved-cpu.sh is used to calculate the SYSTEM_RESERVED_CPU for AutoSizingReserved
Test

./dynamic-system-reserved-cpu.sh 96
SYSTEM_RESERVED_CPU=1.20

stress-slice-single-node.sh is to stress a given node's given slice with specified cpu cores for a period of time
Test

./stress-slice-single-node.sh ip-xx-xx-xx-xx.us-east-2.compute.internal 600 system.slice:4,kubepods.slice:7                                    
[INFO] =========================================
[INFO] Systemd Slice CPU Stress Test (Host-level)
[INFO] =========================================
[INFO] Target Node: ip-xx-xx-xx-xx.us-east-2.compute.internal
[INFO] Duration: 600s
[INFO] Target Slices:
[INFO]   - system.slice: 4 cores
[INFO]   - kubepods.slice: 7 cores
[INFO] =========================================
[INFO] Gathering node information...
[INFO] Node CPU Info:
  Total Capacity: 4 cores
  Allocatable: 3500m cores
  System Reserved: 0.50 cores (500m)
[INFO] Starting stress test on node: ip-xx-xx-xx-xx.us-east-2.compute.internal
[WARN] Using 'oc debug node' to run systemd-run commands directly on the host
=========================================
Starting multi-slice stress test

Launching stress processes...

Starting 4 processes in system.slice...
  Started process 1 in system.slice
  Started process 2 in system.slice
  Started process 3 in system.slice
  Started process 4 in system.slice

Starting 7 processes in kubepods.slice...
  Started process 1 in kubepods.slice
  Started process 2 in kubepods.slice
  Started process 3 in kubepods.slice
  Started process 4 in kubepods.slice
  Started process 5 in kubepods.slice
  Started process 6 in kubepods.slice
  Started process 7 in kubepods.slice

Removing debug pod ...
Running as unit: stress-test-kubepods-slice-1.service
  stress-test-kubepods-slice-1.service loaded active running CPU Stress Test for kubepods.slice Process 1
  stress-test-kubepods-slice-2.service loaded active running CPU Stress Test for kubepods.slice Process 2
  stress-test-kubepods-slice-3.service loaded active running CPU Stress Test for kubepods.slice Process 3
  stress-test-kubepods-slice-4.service loaded active running CPU Stress Test for kubepods.slice Process 4
  stress-test-kubepods-slice-5.service loaded active running CPU Stress Test for kubepods.slice Process 5
  stress-test-kubepods-slice-6.service loaded active running CPU Stress Test for kubepods.slice Process 6
  stress-test-kubepods-slice-7.service loaded active running CPU Stress Test for kubepods.slice Process 7
  stress-test-system-slice-1.service   loaded active running CPU Stress Test for system.slice Process 1
  stress-test-system-slice-2.service   loaded active running CPU Stress Test for system.slice Process 2
  stress-test-system-slice-3.service   loaded active running CPU Stress Test for system.slice Process 3
  stress-test-system-slice-4.service   loaded active running CPU Stress Test for system.slice Process 4

CPU-intensive processes running. Will run for 600 seconds...

[INFO] 
[INFO] =========================================
[INFO] Stress test running for 600 seconds
[INFO] Monitor the output above for node behavior
[INFO] Stress processes are running in the following slices on the HOST:
[INFO]   - system.slice: 4 cores
[INFO]   - kubepods.slice: 7 cores
[INFO] =========================================
[INFO] 
[INFO] Starting background monitoring...
[INFO] Monitoring output will be saved to: stress_test_log_iip-xx-xx-xx-xx.us-east-2.compute.internal_20251209_140745.log
[Time remaining]: 600s

==================== Tue Dec  9 14:07:45 CST 2025 ====================

--- Node Resource Usage ---
NAME                                        CPU(cores)   CPU(%)   MEMORY(bytes)   MEMORY(%)   
ip-xx-xx-xx-xx.us-east-2.compute.internal   3993m        114%     1948Mi          15%         

--- Pods on Node (Non-Running, excluding Completed) ---
All pods running or none found

--- Stress test processes are running ---
[Time remaining]: 590s

  stress-test-kubepods-slice-1.service loaded active running CPU Stress Test for kubepods.slice Process 1
  stress-test-kubepods-slice-2.service loaded active running CPU Stress Test for kubepods.slice Process 2
  stress-test-kubepods-slice-3.service loaded active running CPU Stress Test for kubepods.slice Process 3
  stress-test-kubepods-slice-4.service loaded active running CPU Stress Test for kubepods.slice Process 4
  stress-test-kubepods-slice-5.service loaded active running CPU Stress Test for kubepods.slice Process 5
  stress-test-kubepods-slice-6.service loaded active running CPU Stress Test for kubepods.slice Process 6
  stress-test-kubepods-slice-7.service loaded active running CPU Stress Test for kubepods.slice Process 7
  stress-test-system-slice-1.service   loaded active running CPU Stress Test for system.slice Process 1
  stress-test-system-slice-2.service   loaded active running CPU Stress Test for system.slice Process 2
  stress-test-system-slice-3.service   loaded active running CPU Stress Test for system.slice Process 3
  stress-test-system-slice-4.service   loaded active running CPU Stress Test for system.slice Process 4

[Time remaining]: 580s

==================== Tue Dec  9 14:08:09 CST 2025 ====================
....
=========================================
Stress test completed!
=========================================
[INFO] 
[INFO] =========================================
[INFO] Stress test completed!
[INFO] =========================================
[INFO] Checking final node status...
NAME                                        STATUS   ROLES    AGE     VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE                                                KERNEL-VERSION                 CONTAINER-RUNTIME
ip-xx-xx-xx-xx.us-east-2.compute.internal  Ready    worker   4h45m   v1.34.2   10.0.64.194   <none>        Red Hat Enterprise Linux CoreOS 9.6.20251205-0 (Plow)   5.14.0-570.73.1.el9_6.x86_64   cri-o://1.34.2-2.rhaos4.21.gitc8e8b46.el9
[INFO] 
[INFO] Checking for any evicted or failed pods...
[INFO] No evicted/failed pods found
[INFO] 
[INFO] Recent events on node:
....
[INFO] 
[INFO] =========================================
[INFO] Test Summary
[INFO] =========================================
[INFO] Node: ip-xx-xx-xx-xx.us-east-2.compute.internal
[INFO] Stress Duration: 600s
[INFO] Slices stressed:
[INFO]   - system.slice: 4 cores
[INFO]   - kubepods.slice: 7 cores
[INFO] Total CPU cores stressed: 11
[INFO] Log file: stress_test_log_ip-xx-xx-xx-xx.us-east-2.compute.internal_*.log
[INFO] 
[INFO]   chroot /host journalctl -u stress-test-* --since '10 minutes ago'
[INFO] 
[INFO] Prometheus queries to check (example for first slice):
[INFO]   rate(container_cpu_usage_seconds_total{id="/system.slice", node="ip-xx-xx-xx-xx.us-east-2.compute.internal"}[1m])* 1000
[INFO] =========================================

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Scheduling required tests:
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/test e2e-gcp-ovn

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