<fix>[localstorage]: guard local storage writes by initialized file

[MatheMatrix]

Local storage create and download flows could write into the host root
filesystem when the mount directory existed but the real storage
filesystem was not mounted after boot.

Pass the initialized marker path to normal localstorage agent commands
and manual SFTP download commands. Also write graphical block-device
fstab entries with nofail and a bounded systemd device timeout.

Existing callers remain compatible because the agent guard only runs
when initializedFilePath is sent.

Resolves: ZSV-12865

Change-Id: I7567666471646a7776766763616d626b66677965

sync from gitlab !10676

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📥 Commits

Reviewing files that changed from the base of the PR and between 9f0b59d and 8f4a2a3.

📒 Files selected for processing (2)

• compute/src/main/java/org/zstack/compute/host/MountBlockDeviceHelper.java
• plugin/localstorage/src/main/java/org/zstack/storage/primary/local/LocalStorageKvmSftpBackupStorageMediatorImpl.java

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