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/network/networkd.c

@@ -14,8 +14,8 @@
 #include "main-func.h"
 #include "mkdir-label.h"
 #include "networkd-conf.h"
-#include "networkd-manager-bus.h"
 #include "networkd-manager.h"
+#include "networkd-manager-bus.h"
 #include "networkd-serialize.h"
 #include "service-util.h"
 #include "signal-util.h"