Enhancement of ethtools

### Use Case

In the ethtool we would like to tag the interfaces with it's alias this can be found in /sys/class/net//ifalias.

### Expected behavior

ethtool,driver=igb,host=test01,interface=mgmt0 tx_queue_1_packets=280782i,rx_queue_5_csum_err=0i,<>,ifalias="ifalias-description",autoneg=1i 1564658080000000000

### Actual behavior

ethtool,driver=igb,host=test01,interface=mgmt0 tx_queue_1_packets=280782i,rx_queue_5_csum_err=0i,<>,autoneg=1i 1564658080000000000

### Additional info

_No response_

Start at the ethtool input entry point and inspect how interface data is read from /sys/class/net//ifalias. Confirm that the emitted ethtool measurement includes an ifalias tag when the interface has an alias, matching the expected output.

Written by the indexing model from the issue text.