Fix RT #126566
Fix RT #126566

Exporting multiple custom declarators made them clobber their changes to
$*ACTIONS. Now use %*LANG<MAIN-actions> to chain the changes.

ab5tract/rakudo,awwaiid/rakudo,nbrown/rakudo,awwaiid/rakudo,rakudo/rakudo,b2gills/rakudo,Gnouc/rakudo,softmoth/rakudo,lucasbuchala/rakudo,ugexe/rakudo,tony-o/rakudo,lucasbuchala/rakudo,b2gills/rakudo,ugexe/rakudo,MasterDuke17/rakudo,nbrown/rakudo,Gnouc/rakudo,tbrowder/rakudo,Gnouc/rakudo,nbrown/rakudo,jonathanstowe/rakudo,rakudo/rakudo,tony-o/rakudo,Gnouc/rakudo,labster/rakudo,rakudo/rakudo,tbrowder/rakudo,zostay/rakudo,salortiz/rakudo,salortiz/rakudo,sjn/rakudo,Gnouc/rakudo,raydiak/rakudo,samcv/rakudo,b2gills/rakudo,jonathanstowe/rakudo,tbrowder/rakudo,ab5tract/rakudo,tony-o/rakudo,tbrowder/rakudo,usev6/rakudo,zostay/rakudo,ugexe/rakudo,tbrowder/rakudo,labster/rakudo,samcv/rakudo,tbrowder/rakudo,labster/rakudo,ab5tract/rakudo,labster/rakudo,azawawi/rakudo,sjn/rakudo,samcv/rakudo,zostay/rakudo,softmoth/rakudo,labster/rakudo,usev6/rakudo,azawawi/rakudo,ab5tract/rakudo,b2gills/rakudo,dankogai/rakudo,lucasbuchala/rakudo,labster/rakudo,dankogai/rakudo,raydiak/rakudo,awwaiid/rakudo,softmoth/rakudo,Gnouc/rakudo,lucasbuchala/rakudo,azawawi/rakudo,tony-o/rakudo,salortiz/rakudo,zostay/rakudo,usev6/rakudo,rakudo/rakudo,LLFourn/rakudo,usev6/rakudo,salortiz/rakudo,salortiz/rakudo,awwaiid/rakudo,dankogai/rakudo,MasterDuke17/rakudo,jonathanstowe/rakudo,jonathanstowe/rakudo,softmoth/rakudo,salortiz/rakudo,rakudo/rakudo,MasterDuke17/rakudo,raydiak/rakudo,azawawi/rakudo,sjn/rakudo,usev6/rakudo,nbrown/rakudo,LLFourn/rakudo,dankogai/rakudo,ugexe/rakudo,raydiak/rakudo,MasterDuke17/rakudo,ab5tract/rakudo,azawawi/rakudo,softmoth/rakudo,nbrown/rakudo,samcv/rakudo,awwaiid/rakudo,rakudo/rakudo,LLFourn/rakudo,LLFourn/rakudo,sjn/rakudo,b2gills/rakudo,ugexe/rakudo,dankogai/rakudo,lucasbuchala/rakudo,tony-o/rakudo,MasterDuke17/rakudo,nbrown/rakudo,LLFourn/rakudo,MasterDuke17/rakudo,sjn/rakudo,jonathanstowe/rakudo,tony-o/rakudo,samcv/rakudo