[libc++] Avoid including all of <thread> in <future> (#116541)

Author: philnik777

libcxx/include/future

@@ -384,6 +384,7 @@ template <class R, class Alloc> struct uses_allocator<packaged_task<R>, Alloc>;
 #  include <__system_error/error_category.h>
 #  include <__system_error/error_code.h>
 #  include <__system_error/error_condition.h>
+#  include <__thread/thread.h>
 #  include <__type_traits/add_lvalue_reference.h>
 #  include <__type_traits/aligned_storage.h>
 #  include <__type_traits/conditional.h>
@@ -397,7 +398,6 @@ template <class R, class Alloc> struct uses_allocator<packaged_task<R>, Alloc>;
 #  include <mutex>
 #  include <new>
 #  include <stdexcept>
-#  include <thread>
 #  include <version>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -2071,6 +2071,7 @@ _LIBCPP_POP_MACROS
 #  include <exception>
 #  include <iosfwd>
 #  include <system_error>
+#  include <thread>
 #endif
 
 #endif // _LIBCPP_FUTURE

libcxx/test/libcxx/transitive_includes/cxx23.csv

@@ -445,8 +445,6 @@ functional tuple
 functional typeinfo
 functional unordered_map
 functional version
-future array
-future atomic
 future bitset
 future cctype
 future cerrno
@@ -475,7 +473,6 @@ future stdexcept
 future streambuf
 future string
 future string_view
-future thread
 future tuple
 future typeinfo
 future version

libcxx/test/libcxx/transitive_includes/cxx26.csv

@@ -444,8 +444,6 @@ functional tuple
 functional typeinfo
 functional unordered_map
 functional version
-future array
-future atomic
 future bitset
 future cctype
 future cerrno
@@ -474,7 +472,6 @@ future stdexcept
 future streambuf
 future string
 future string_view
-future thread
 future tuple
 future typeinfo
 future version

libcxx/test/std/thread/futures/futures.async/async.pass.cpp

@@ -27,6 +27,7 @@
 #include <chrono>
 #include <future>
 #include <memory>
+#include <thread>
 
 #include "test_macros.h"