Currently calling web3_clientVersion RPC on this node returns the version of Reth being used (currently 1.8.1). This is confusing for third parties running this node who need to differentiate it from vanilla Reth and also understand what version of the reth extension software they're running.

Introduce a new RPC override for it such that it returns {RETH_VERSION]-{EXTENSION_VERSION} i.e. currently it would be 1.8.1-0.1.9 instead of just 1.8.1