net/litep2p: Propagate ValuePut events to the network backend (#5018)
The `DhtEvent::ValuePut` was not propagated back to the higher levels. This PR ensures we'll send the ValuePut event similarly to `DhtEvent::ValuePutFailed` ### Next Steps - [ ] A bit more testing Thanks @alexggh for catching this🙏 cc @paritytech/networking Signed-off-by: Alexandru Vasile <[email protected]>