`IterateParameters` does a poor job:
- it doesn't encapsulate well, because it returns a pointer,
- it has a clunky interface, compared to range loop.
I have decided to return parameter slice and not `iter.Seq` for 2
reasons:
1. There already is `SetParameters`, so `NetworkConfig` struct is
expected to be modified.
2. This iterator uses pointers, so even with this interface the slice
can already be changed.
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>