[io grant] Restore IO::Handle.IO
[io grant] Restore IO::Handle.IO

After more thought, it was a bit too much to remove it along with
other IO::Pathy methods. Bringing it back, mostly so that IO() coercers
take it, just like they take Cools. And it makes far more sense to
coerce an IO::Handle to IO::Path than it does to coerce a Complex.

Gnouc/rakudo,rakudo/rakudo,lucasbuchala/rakudo,nbrown/rakudo,tbrowder/rakudo,tony-o/rakudo,lucasbuchala/rakudo,Gnouc/rakudo,tbrowder/rakudo,labster/rakudo,jonathanstowe/rakudo,salortiz/rakudo,lucasbuchala/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,salortiz/rakudo,labster/rakudo,tony-o/rakudo,salortiz/rakudo,labster/rakudo,rakudo/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,nbrown/rakudo,sjn/rakudo,tony-o/rakudo,jonathanstowe/rakudo,usev6/rakudo,rakudo/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,awwaiid/rakudo,sjn/rakudo,labster/rakudo,MasterDuke17/rakudo,nbrown/rakudo,tony-o/rakudo,nbrown/rakudo,labster/rakudo,awwaiid/rakudo,softmoth/rakudo,MasterDuke17/rakudo,softmoth/rakudo,salortiz/rakudo,jonathanstowe/rakudo,jonathanstowe/rakudo,jonathanstowe/rakudo,rakudo/rakudo,tony-o/rakudo,salortiz/rakudo,usev6/rakudo,softmoth/rakudo,labster/rakudo,Gnouc/rakudo,lucasbuchala/rakudo,softmoth/rakudo,rakudo/rakudo,tbrowder/rakudo,rakudo/rakudo,usev6/rakudo,softmoth/rakudo,raydiak/rakudo,raydiak/rakudo,tbrowder/rakudo,sjn/rakudo,awwaiid/rakudo,awwaiid/rakudo,sjn/rakudo,raydiak/rakudo,salortiz/rakudo,tony-o/rakudo,lucasbuchala/rakudo,usev6/rakudo,Gnouc/rakudo,raydiak/rakudo,nbrown/rakudo,nbrown/rakudo,usev6/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,sjn/rakudo,awwaiid/rakudo