neorados/cls/fifo/detail/fifo: include strtol.h

ceph@a2d2664

ftbfs:
```
/home/jenkins-build/build/workspace/ceph-pull-requests/src/neorados/cls/fifo/detail/fifo.h:630:14: error: no member named 'parse' in namespace 'ceph'; did you mean 'pause'?
  630 |     auto n = ceph::parse<decltype(m.num)>(num);
      |              ^~~~~~~~~~~
```

Signed-off-by: Matan Breizman <[email protected]>

Author: Matan-B

src/neorados/cls/fifo/detail/fifo.h

@@ -34,6 +34,7 @@
 
 #include "common/dout.h"
 #include "common/dout_fmt.h"
+#include "common/strtol.h"
 
 #include "cls/fifo/cls_fifo_types.h"
 #include "cls/fifo/cls_fifo_ops.h"