Fix tests for modules

Author: smallp-o-p

libcxx/test/std/utilities/text_encoding/text_encoding.ctor/default.pass.cpp

@@ -16,6 +16,7 @@
 
 #include <cassert>
 #include <text_encoding>
+#include <type_traits>
 
 int main(int, char**) {
   // 1. Default constructor must be nothrow

libcxx/test/std/utilities/text_encoding/text_encoding.members/aliases.compile.pass.cpp

@@ -18,6 +18,7 @@
 // 1. Verify that text_encoding::aliases_view satisfies ranges::forward_range, copyable, view,
 //    ranges::random_access_range and ranges::borrowed_range
 
+#include <concepts>
 #include <text_encoding>
 
 static_assert(std::copyable<std::text_encoding::aliases_view>);

libcxx/test/std/utilities/text_encoding/text_encoding.members/text_encoding.aliases_view/begin.pass.cpp

@@ -13,6 +13,7 @@
 // struct text_encoding::aliases_view
 
 #include <cassert>
+#include <ranges>
 #include <text_encoding>
 
 using id = std::text_encoding::id;

libcxx/test/std/utilities/text_encoding/text_encoding.members/text_encoding.aliases_view/front.pass.cpp

@@ -13,6 +13,7 @@
 // struct text_encoding::aliases_view
 
 #include <cassert>
+#include <ranges>
 #include <text_encoding>
 
 using id = std::text_encoding::id;