chore: Enable clang-tidy bugprone-move-forwarding-reference check (#6457)

.clang-tidy

@@ -24,6 +24,7 @@ Checks: "-*,
   bugprone-misplaced-operator-in-strlen-in-alloc,
   bugprone-misplaced-pointer-arithmetic-in-alloc,
   bugprone-misplaced-widening-cast,
+  bugprone-move-forwarding-reference,
   bugprone-multi-level-implicit-pointer-conversion,
   bugprone-multiple-new-in-one-expression,
   bugprone-multiple-statement-macro,

src/test/protocol/MultiApiJson_test.cpp

@@ -556,7 +556,7 @@ struct MultiApiJson_test : beast::unit_test::suite
             static_assert([](auto&& v) {
                 return !requires {
                     v.visitor(
-                        std::move(v),  // cannot bind rvalue
+                        decltype(v){},  // cannot bind rvalue
                         1,
                         [](Json::Value&, auto) {});
                 };