Network configuration should not be set if networking mode of ECS task is not awsvpc

[abom]

Even if we are setting capacity provider strategy, the action sends network configuration when running the task, while it shouldn't do this if the mode is e.g. bridged or host, because it can cause issues like

Error: Network Configuration is not valid for the given `networkMode` of this task definition. 

According to documentation, it's required only for awsvpc network mode (even if capacity provider strategy is set)