VM Metrics CPU Utilisation Percentage | CPU Cap enabled Compute Offering

##### ISSUE TYPE

* Enhancement Request
##### COMPONENT NAME

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UI CPU Metrics
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##### CLOUDSTACK VERSION

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4.18.1
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##### CONFIGURATION

##### OS / ENVIRONMENT

KVM on Ubuntu 20.04

##### SUMMARY

On Deploying a VM with CPU CAP enabled offering, the CPU usage Metrics Not Hitting 100%, Its considering Actual Usage not the wait/steal time. Ideally It should be Usage + Steal+wait...
CPU Based auto scaling on above VM will also be affected by this.

##### STEPS TO REPRODUCE

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1. Create compute offering with a lower CPU speed with CPU Cap Enabled
2. Deploy A VM with this offering
3. Induce stress in VM using stress command to utilize 100% CPU
4. Observe CPU Metrics
5. CPU Percentage not hit 100%
~~~

##### EXPECTED RESULTS

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CPU Percentage should show 100%
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##### ACTUAL RESULTS

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CPU Percentage Incorrect
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在 KVM 上使用受 CPU 限制的计算方案，并运行列出的 stress 命令的 VM 来复现该行为，然后检查 CloudStack UI 的 CPU 指标是如何计算的。当显示的 CPU 百分比在所述工作负载下达到预期的 100%，且基于 CPU 的自动扩展不再受到影响时，即视为完成。

由索引模型根据 Issue 内容生成。