[libc++] Implement ranges::is_sorted{, _until}

Reviewed By: Mordante, var-const, #libc

Spies: libcxx-commits, mgorny

Differential Revision: https://reviews.llvm.org/D125608

NOKEYCHECK=True
GitOrigin-RevId: 11e3ad299feee35d2a8a1291d9155b68636362e6
diff --git a/include/module.modulemap b/include/module.modulemap
index 0e43ca4..d186ebe 100644
--- a/include/module.modulemap
+++ b/include/module.modulemap
@@ -315,6 +315,8 @@
       module ranges_for_each          { private header "__algorithm/ranges_for_each.h" }
       module ranges_for_each_n        { private header "__algorithm/ranges_for_each_n.h" }
       module ranges_is_partitioned    { private header "__algorithm/ranges_is_partitioned.h" }
+      module ranges_is_sorted         { private header "__algorithm/ranges_is_sorted.h" }
+      module ranges_is_sorted_until   { private header "__algorithm/ranges_is_sorted_until.h" }
       module ranges_max               { private header "__algorithm/ranges_max.h" }
       module ranges_max_element       { private header "__algorithm/ranges_max_element.h" }
       module ranges_min               { private header "__algorithm/ranges_min.h" }