Unable to enter maintenace mode periodically

##### ISSUE TYPE

* Bug Report

##### COMPONENT NAME

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Maintenance Mode
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##### CLOUDSTACK VERSION

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4.19.1.0
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##### CONFIGURATION

Advanced Networking
Three KVM Hosts, two of the three hosts run the management servers and database (master/replica).

##### OS / ENVIRONMENT

Ubuntu 22.04

##### SUMMARY

When attempting to put hosts into maintenance mode, some instances migrate, but some still remain on the host until it reaches ErrorInMaintenance. When looking at the agent logs on the host that is being vacated, there appears to be no interaction it receives from the management server during these times when an instance is having issues migrating.

Management Server Log snippet:


##### STEPS TO REPRODUCE

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1. Enter a host into maintenance mode
2. Wait for status to change into a permanent state.
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##### EXPECTED RESULTS

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Host enters into maintenance.
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##### ACTUAL RESULTS

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Host enters into ErrorInMaintenance.
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payload 没有列出源文件或测试；从 Maintenance Mode 工作流开始，并在所描述的三主机高级网络设置上重现该流程。当实例仍留在主机上时，比较 management-server 和 agent 的日志，并在主机达到 maintenance 而不是 ErrorInMaintenance 时视为工作完成。

由索引模型根据 Issue 内容生成。