[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/future b/include/future
index d794fae..5d2732b 100644
--- a/include/future
+++ b/include/future
@@ -364,6 +364,8 @@
 #include <__availability>
 #include <__config>
 #include <__debug>
+#include <__utility/__decay_copy.h>
+#include <__utility/forward.h>
 #include <chrono>
 #include <exception>
 #include <memory>