Disk usage metrics do not work in specific zone

##### ISSUE TYPE

* Other

##### COMPONENT NAME

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VMWARE
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##### CLOUDSTACK VERSION

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4.18
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##### CONFIGURATION

##### OS / ENVIRONMENT

##### SUMMARY
In my environment, I use 2 zones.

However, in the "x" zone, the metrics part presents a problem when displaying disk and network data.

While in zone "y" all data is shown normally.

Do you have any specific connectivity tests to do?

In principle, the zone settings are identical, the only difference is the following:

Zone X
System VM's -> KVM (The only KVM it has are the two SystemVM)
Zone X environment uses VMware vSphere Client version 6.7.0

Zone y uses the system VM and entire environment with vSphere Client version 7.0.3.01700

##### Remembering that the disk and network metrics just do not appear in the problem area, but the CPU and memory metrics work normally.

Zone X:

Zone Y:

該 issue 未列出任何檔案、測試或進入點。首先在兩個 zone 中重現 metrics view，並比較 VMware vSphere 6.7.0 和 7.0.3.01700 環境，重點關注為什麼磁碟和網路資料缺失，而 CPU 和記憶體卻能顯示。完成標準是找出並修正原因，讓四種 metric 類型都能在 zone X 中顯示。

由索引模型根據 Issue 內容生成。