TimerService: mark component as part of KataOS

This fixes debug builds which otherwise have an undefined reference
to SELF_CNODE.

Change-Id: I55384cfff19b99cf49b147d396b274c74bdf5db5
GitOrigin-RevId: d055b070ee5a67f1648566d1c1c511446d02b3cc

apps/system/components/TimerService/TimerService.camkes

@@ -7,4 +7,7 @@ component TimerService {
   consumes Interrupt timer_interrupt;
 
   uses LoggerInterface logger;
-}
+
+  // Enable KataOS CAmkES support.
+  attribute int kataos = true;
+}