The target version of automatic upgrade.
For example: MA5600V800R003C02.
Allow querying the target version only during automatic upgrade.
The system configuration management platform is locked during automatic upgrade.
When you are setting the target version of an object in an upgrade,
you also need to set hwUpgradeRequestID, hwUpgradeAdmin, and hwUpgradeResetInterval.
Automatic upgrade requires consistency between the program version
saved in the standby area of the system and the set target version.
If the target version is not specified, the system performs automatic
upgrade according to the version saved in the standby area of the system.