LibJS+LibWeb: Use new Cell::Visitor helpers to avoid manual iteration

Author: https://github.com/awesomekling
Commit: 53d0dd4a2e
Pull-request: https://github.com/SerenityOS/serenity/pull/23971
Reviewed-by: https://github.com/trflynn89

Userland/Libraries/LibJS/Bytecode/Executable.cpp

@@ -53,8 +53,7 @@ void Executable::dump() const
 void Executable::visit_edges(Visitor& visitor)
 {
     Base::visit_edges(visitor);
-    for (auto constant : constants)
-        visitor.visit(constant);
+    visitor.visit(constants);
 }
 
 }