Added test definition for 4K Fio Test.
Added test definition for 4K Fio Test.

iamshital/azure-linux-automation,konkasoftci/azure-linux-automation,konkasoftci/azure-linux-automation,v-sirebb/azure-linux-automation,v-sirebb/azure-linux-automation,v-sirebb/azure-linux-automation,iamshital/azure-linux-automation,iamshital/azure-linux-automation,konkasoftci/azure-linux-automation