Fix the cppcheck, clang-tidy and legacy-comparison CI failures

- to_json_tuple_impl() moved the element in both branches of a ternary;
  only one runs, but cppcheck reported accessMoved. Use if/else.
- The ABI tag test looked for "json_abi_bics", which misses when another
  tag comes first, as in json_abi_ldvcmp_bics; look for "_bics".
- readability-qualified-auto in the items() test.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

include/nlohmann/detail/conversions/to_json.hpp

@@ -484,7 +484,14 @@ inline void to_json_tuple_impl(BasicJsonType& j, const Tuple& t, index_sequence<
     // keeps a string type constructible from 0 from selecting operator[](key)
     const bool is_member = element.is_array() && element.size() == 2
                            && element[static_cast<typename BasicJsonType::size_type>(0)].is_string();
-    j = is_member ? BasicJsonType::object({std::move(element)}) : BasicJsonType::array({std::move(element)});
+    if (is_member)
+    {
+        j = BasicJsonType::object({std::move(element)});
+    }
+    else
+    {
+        j = BasicJsonType::array({std::move(element)});
+    }
 }
 #endif