Add Module::CoreList for check is module shipped with perl core

[bor]

It's also allow to keep a correct perl version from which module comes and will be deprecated.
And allow put those dependencies into a generated ebuild.

[bor]

Seems like there is already existent solution (by @kentfredric), which might be used also
https://metacpan.org/pod/Gentoo::Util::VirtualDepend#module_is_perl