Remove `attohttpc` as a dependency

[onbjerg]

Describe the feature

attohttpc is required by reth-net-nat through igd-next which is used to find the machine's gateway over UPNP. We need to replace igd-next.

The only place it is used is here:

https://github.com/paradigmxyz/reth/blob/9567b256c8cb4a8cd439bd7e6e7b1be3b032efde/crates/net/nat/src/lib.rs#L244-L259

Additional context

No response

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