[4.8.38][ZSTAC-85986] cherry-pick ZSTAC-61889

[zstack-robot-2]

Cherry-pick 5.x merged source fix ZSTAC-61889 into 4.8.38 for ZSTAC-85986.

sync from gitlab !10221

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: e6e3cedd-7865-4122-a055-957371b43702

📥 Commits

Reviewing files that changed from the base of the PR and between 752b8b5 and e9afead.

⛔ Files ignored due to path filters (1)

• conf/springConfigXml/volumeSnapshot.xml is excluded by !**/*.xml

📒 Files selected for processing (4)

• header/src/main/java/org/zstack/header/storage/snapshot/VolumeSnapshotDBSyncExtensionPoint.java
• plugin/kvm/src/main/java/org/zstack/kvm/KVMHost.java
• storage/src/main/java/org/zstack/storage/snapshot/VolumeSnapshotManagerImpl.java
• test/src/test/groovy/org/zstack/test/integration/storage/snapshot/CreateSnapshotRollbackAfterDataPlaneSuccessCase.groovy

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch sync/shan.wu/fix/4.8.38/ZSTAC-85986

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