Nokia SROS 100G breakout ports

[sdktr]

Nokia SROS when provisioned on a 100G+ platform (IXR-X1 for example) still requires a breakout config even if the port is dedicated to just one link. This logic is not in netlab at the moment, so we have no out-of-the-box working configs for two nodes connecting on 100G.

Just wanted to confirm with @jbemmel that I'm drawing the right conclusion here.

Repro:

provider: clab
defaults:
  device: sros
nodes:
  S1:
    module: [ bfd, ospf ]
    clab.type: ixr-x1

  S2:
    module: [ bfd, ospf ]
    clab.type: ixr-x1

links:
- S1-S2

Provisioned ports are in the format:
1/1/c1.

this errors during the configuration of the ethernet port ('capabilities ethernet not supported on port 1/1/c1')

A breakout-but-no-breakout-config is configured as:

    port 1/1/c1 {
        admin-state enable
        connector {
            breakout c1-100g
        }
    }
    port 1/1/c1/1 {
        admin-state enable
    }

[sdktr]

I think @jbemmel intended to have this breakout configured in a lower tier of the stack..: hellt/vrnetlab#114

If this PR is merged, how would you envision this to wrap into netlab? In vrnetlab we have a starting defintion of the hardware type, where the 'connector' property can be read from. This is not the case in netlab, where I assume it is very much appreciated if the actual interface name is known pretty early on.