Detect direct circular dependency as a core kwalitee issue

[dolmen]

Example: https://metacpan.org/source/DOLMEN/Dist-Zilla-PluginBundle-MARCEL-1.161470/META.json#L55

Package Dist::Zilla::Plugin::InlineFilesMARCEL is both in provides and in prereqs/runtime/requires.

(You get this kind of issues when you rely too much on tools automatically collecting the prereqs)

[karenetheridge]

(FWIW, this can also be checked for at the packaging stage with Dist::Zilla::Plugin::CheckSelfDependency.)

[dolmen]

@ether The reason why this happened is discussed in RT#114748.