Fix migrateCommand may migrate wrong value. (#8815)
Fix migrateCommand may migrate wrong value. (#8815)

This scene is hard to happen. When first attempt some keys expired,
only kv position is updated not ov. Then socket err happens, second
attempt is taken. This time kv items may be mismatching with ov items.
JackieXie168/redis,JackieXie168/redis,JackieXie168/redis,JackieXie168/redis