tree-wide: Sort includes

This was done by running a locally built clang-format with
https://github.com/llvm/llvm-project/pull/137617 and
https://github.com/llvm/llvm-project/pull/137840 applied on all .c
and .h files.

src/test/test-execute.c

@@ -10,8 +10,8 @@
 
 #include "build-path.h"
 #include "capability-util.h"
-#include "cpu-set-util.h"
 #include "copy.h"
+#include "cpu-set-util.h"
 #include "dropin.h"
 #include "errno-list.h"
 #include "fd-util.h"
@@ -27,8 +27,8 @@
 #include "seccomp-util.h"
 #include "service.h"
 #include "signal-util.h"
-#include "static-destruct.h"
 #include "stat-util.h"
+#include "static-destruct.h"
 #include "sysctl-util.h"
 #include "tests.h"
 #include "tmpfile-util.h"