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/shared/loop-util.c

@@ -23,8 +23,8 @@
 #include "env-util.h"
 #include "errno-util.h"
 #include "fd-util.h"
-#include "fs-util.h"
 #include "fileio.h"
+#include "fs-util.h"
 #include "loop-util.h"
 #include "missing_fs.h"
 #include "parse-util.h"