Refactor circumfix:sym<{ }> as hash constructor, fixes RT #74050 and cleans up a few items.
Refactor circumfix:sym<{ }> as hash constructor, fixes RT #74050
and cleans up a few items.

ungrim97/rakudo,rjbs/rakudo,cognominal/rakudo,raydiak/rakudo,LLFourn/rakudo,raydiak/rakudo,LLFourn/rakudo,tbrowder/rakudo,skids/rakudo,ab5tract/rakudo,softmoth/rakudo,laben/rakudo,cognominal/rakudo,Gnouc/rakudo,salortiz/rakudo,sergot/rakudo,usev6/rakudo,labster/rakudo,softmoth/rakudo,teodozjan/rakudo,nbrown/rakudo,usev6/rakudo,labster/rakudo,nbrown/rakudo,sergot/rakudo,tony-o/deb-rakudodaily,MasterDuke17/rakudo,dwarring/rakudo,paultcochrane/rakudo,azawawi/rakudo,lucasbuchala/rakudo,usev6/rakudo,awwaiid/rakudo,b2gills/rakudo,rjbs/rakudo,sjn/rakudo,nunorc/rakudo,ungrim97/rakudo,awwaiid/rakudo,MasterDuke17/rakudo,lucasbuchala/rakudo,lucasbuchala/rakudo,paultcochrane/rakudo,softmoth/rakudo,cygx/rakudo,sergot/rakudo,jonathanstowe/rakudo,cognominal/rakudo,rakudo/rakudo,ungrim97/rakudo,rakudo/rakudo,softmoth/rakudo,zhuomingliang/rakudo,dankogai/rakudo,cygx/rakudo,pmurias/rakudo,dankogai/rakudo,tony-o/deb-rakudodaily,MasterDuke17/rakudo,pmurias/rakudo,cognominal/rakudo,sjn/rakudo,salortiz/rakudo,labster/rakudo,pmurias/rakudo,rakudo/rakudo,jonathanstowe/rakudo,tony-o/rakudo,b2gills/rakudo,ugexe/rakudo,awwaiid/rakudo,niner/rakudo,laben/rakudo,rjbs/rakudo,zostay/rakudo,nbrown/rakudo,sergot/rakudo,tony-o/deb-rakudodaily,salortiz/rakudo,rakudo/rakudo,retupmoca/rakudo,dwarring/rakudo,nbrown/rakudo,jonathanstowe/rakudo,zostay/rakudo,lucasbuchala/rakudo,tbrowder/rakudo,labster/rakudo,Gnouc/rakudo,ungrim97/rakudo,ungrim97/rakudo,paultcochrane/rakudo,ugexe/rakudo,raydiak/rakudo,azawawi/rakudo,MasterDuke17/rakudo,awwaiid/rakudo,retupmoca/rakudo,nunorc/rakudo,tbrowder/rakudo,retupmoca/rakudo,teodozjan/rakudo,tony-o/deb-rakudodaily,cognominal/rakudo,salortiz/rakudo,tony-o/deb-rakudodaily,ab5tract/rakudo,Leont/rakudo,zostay/rakudo,cygx/rakudo,LLFourn/rakudo,tony-o/deb-rakudodaily,samcv/rakudo,sjn/rakudo,LLFourn/rakudo,Leont/rakudo,cygx/rakudo,sjn/rakudo,labster/rakudo,zhuomingliang/rakudo,Gnouc/rakudo,b2gills/rakudo,sjn/rakudo,MasterDuke17/rakudo,usev6/rakudo,paultcochrane/rakudo,skids/rakudo,rakudo/rakudo,Gnouc/rakudo,ugexe/rakudo,softmoth/rakudo,teodozjan/rakudo,LLFourn/rakudo,tony-o/rakudo,tony-o/deb-rakudodaily,samcv/rakudo,paultcochrane/rakudo,azawawi/rakudo,raydiak/rakudo,nunorc/rakudo,samcv/rakudo,Leont/rakudo,tony-o/rakudo,MasterDuke17/rakudo,dankogai/rakudo,skids/rakudo,samcv/rakudo,skids/rakudo,nunorc/rakudo,niner/rakudo,tbrowder/rakudo,dankogai/rakudo,salortiz/rakudo,rakudo/rakudo,nbrown/rakudo,ugexe/rakudo,azawawi/rakudo,dwarring/rakudo,niner/rakudo,b2gills/rakudo,tbrowder/rakudo,teodozjan/rakudo,Gnouc/rakudo,ab5tract/rakudo,niner/rakudo,tony-o/rakudo,samcv/rakudo,pmurias/rakudo,zhuomingliang/rakudo,jonathanstowe/rakudo,laben/rakudo,labster/rakudo,tony-o/rakudo,dankogai/rakudo,skids/rakudo,jonathanstowe/rakudo,awwaiid/rakudo,tbrowder/rakudo,dwarring/rakudo,tony-o/rakudo,ab5tract/rakudo,Gnouc/rakudo,zostay/rakudo,salortiz/rakudo,lucasbuchala/rakudo,Leont/rakudo,zhuomingliang/rakudo,azawawi/rakudo,ugexe/rakudo,cygx/rakudo,retupmoca/rakudo,nbrown/rakudo,b2gills/rakudo,laben/rakudo,usev6/rakudo,ab5tract/rakudo