sd-device: do not read uevent file in device_clone_with_db()
Follow-up for
381f6d4ba5551898e7ff19189485072b94879281.
When the function is called, the device may be already removed, and
another device has the same syspath. Such situation can occur when a
partition removed and another is created. In that case, the sysfs paths
of the removed and newly created partitions can be same, but their
devnums are different, and thus the database files corresponding to the
devices are also different.
Fixes #27981.