p2p: Revamp the options pattern

We do [this](https://github.com/celestiaorg/go-header/blob/c82c1b320391bb97895734eb793f0a27216908f5/p2p/options.go#L60-L63) to make a single option usable in different contexts, but it's ugly and error-prone. Think of a cleaner way to accomplish the same goal.

Start by reading p2p/options.go at lines 60-63 and the surrounding options pattern. Identify the different contexts that require one option to be reused, then compare possible cleaner designs against that same requirement. Done means the existing behavior is preserved with a less error-prone options pattern.

Written by the indexing model from the issue text.