We have been seeing some port conflicts like:
```
[2023-08-15T00:31:47.625Z] Geth 0 failed to start
```
```
$ tail -n1 local-testnet-mainnet/logs/geth.?.txt
==> local-testnet-mainnet/logs/geth.0.txt <==
Fatal: Error starting protocol stack: listen tcp :6801: bind: address already in use
==> local-testnet-mainnet/logs/geth.1.txt <==
Fatal: Error starting protocol stack: listen tcp :6806: bind: address already in use
==> local-testnet-mainnet/logs/geth.2.txt <==
Fatal: Error starting protocol stack: listen tcp :6811: bind: address already in use
```
In order to debug this we'll need to add printing of some extra info
into `unstable` so feature branches include it.
Related: https://github.com/status-im/nimbus-eth2/issues/4575
Signed-off-by: Jakub Sokołowski <jakub@status.im>