Packer Azure Image accelerated networking enabled

_This issue was originally opened by @rajeeshkumarkk as hashicorp/packer#8381. It was migrated here as a result of the [Packer plugin split](https://github.com/hashicorp/packer/issues/8610#issuecomment-770034737). The original body of the issue is below._

#### Feature Description: I am not sure if the latest version of Packer is capable of building an Azure image with accelerated networking enabled. When I build Azure image and launch an Azure VM from the custom image it says "The selected image does not support accelerated networking.
I couldn't find a Optional builder to specify accelerated networking true in Packer template. Could you please help me with this ?

A written overview of the feature.: Accelerated networking enables single root I/O virtualization (SR-IOV) to a VM, greatly improving its networking performance. This high-performance path bypasses the host from the datapath, reducing latency, jitter, and CPU utilization, for use with the most demanding network workloads on supported VM types. Packer needs to have a optional builder parameters to enable the accelerated networking for the image it is building so the custom image can be used with accelerated networking enabled.

#### Use Case(s) Packer built custom image can be use to create VM with accelerated networking enabled.

Any relevant use-cases that you see. Production Apps VM needs to be with accelerated networking enabled.