Unable to automatically download the systemvm template in a multihypervisor cluster/environment

### problem

Unable to automatically download the systemvm template in a multihypervisor cluster/environment

### versions

ACS 4.22 , vmware 8 and kvm 24.0.4

### The steps to reproduce the bug

1. Create a Cloudstack environment with 2 clusters ( vmware )

2. Launch systemvm's on the vmware cluster, make sure they are in running state

3. Create a KVM cluster , make sure add a KVM host and a primary storage

4. The systemvm-template for the kvm cluster will not get downloaded automatically , it will be struck in Not ready state

Workaround

login to the running ssvm on the vmware cluster and restart the cloud-service

service cloud restart

This will trigger the download of the systemvm template for kvm

### What to do about it?

Cloudstack should automatically download the systemvm template for the kvm cluster and manually restart of the cloud service should not be needed

使用 ACS 4.22，按照列出的步骤在 VMware 和 KVM 集群中复现该问题，并观察 KVM 的 systemvm-template 仍为 Not ready。调查系统 VM 模板的下载流程，并验证 KVM 模板是否会在运行中的 VMware 系统 VM 上无需重启 cloud-service 即自动下载。

由索引模型根据 Issue 内容生成。