see issue: https://github.com/kubevirt/kubevirt/issues/13499

Check if UI uses the `kubevirt_vmi_migration_disk_transfer_rate_bytes` metric, if yes, update to the new name
`kubevirt_vmi_migration_memory_transfer_rate_bytes`.

Description of problem:

The metric name is wrong and should be renamed to kubevirt_vmi_migration_memory_transfer_rate_bytes

Version-Release number of selected component (if applicable):

4.15 and above 

How reproducible:

Steps to Reproduce:

1. 
2.
3.

Actual results:

Wrong naming to value

Expected results:

Correct naming to value 

Additional info: