Fix language around "implemented" interfaces in CLI

[jsolbrig]

Requested Update

Description

Currently, geoips list interfaces takes a -i/--implemented flag to only list the interfaces that have plugins implemented in each package. This language is a little confusing. I think it should be updated to --with-plugins and that flag's help should say something like "Only list interfaces for which plugins have been implemented in each package."

I'm open to other suggestions for this.

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