IWYU: Update for Debian 12 CI job

`include-what-you-use` diagnostics, in practice, are specific to
the environment's compiler and standard library.  Update includes
to satisfy IWYU for our CI job under Debian 12.

Source/cmLocalGenerator.cxx

@@ -10,6 +10,7 @@
 #include <initializer_list>
 #include <iterator>
 #include <sstream>
+#include <type_traits>
 #include <unordered_set>
 #include <utility>
 #include <vector>
@@ -40,6 +41,7 @@
 #include "cmLinkLineDeviceComputer.h"
 #include "cmList.h"
 #include "cmMakefile.h"
+#include "cmMessageType.h"
 #include "cmRange.h"
 #include "cmRulePlaceholderExpander.h"
 #include "cmSourceFile.h"