[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/map b/include/map
index c7f7df2..0da590f 100644
--- a/include/map
+++ b/include/map
@@ -493,6 +493,7 @@
 #include <__debug>
 #include <__node_handle>
 #include <__tree>
+#include <__utility/forward.h>
 #include <compare>
 #include <functional>
 #include <initializer_list>