Remove options::X__name (#7414)

Remove options::X__name (#7414)

This PR removes the static strings options::module::X__name that hold the primary long option name. We used them to figure out which option an handler function was called on for certain handler functions. This was always a weird way, and the past refactorings have eliminated all these cases.
This also removes the need to the two arguments option and flag to all option handlers.