Allow all in/out communications to and from the compute subnet

[xpillons]

compute nodes may have to communicate on ports which are already closed. This is the case for NCCL for which there is no way to restrict the port used at the application level but only at the OS level https://docs.nvidia.com/deeplearning/nccl/user-guide/docs/troubleshooting.html#ip-ports

Suggestion to create a single NSG rule which will allows all TCP traffic on all ports within the compute subnet