[libcxx][modularisation] moves <utility> content out of <type_traits>
Moves:
* `std::move`, `std::forward`, `std::declval`, and `std::swap` into
`__utility/${FUNCTION_NAME}`.
* `std::swap_ranges` and `std::iter_swap` into
`__algorithm/${FUNCTION_NAME}`
Differential Revision: https://reviews.llvm.org/D103734
NOKEYCHECK=True
GitOrigin-RevId: 6adbc83ee9e46b476e0f75d5671c3a21f675a936
diff --git a/include/functional b/include/functional
index 68ed22e..249c0dc 100644
--- a/include/functional
+++ b/include/functional
@@ -491,6 +491,7 @@
#include <__debug>
#include <__functional_base>
#include <__functional/search.h>
+#include <__utility/forward.h>
#include <concepts>
#include <exception>
#include <memory>