Reimplement arch alarm timer on top of oneshot driver framework

The benefit include:

1. Simplify the implementation
2. Support both tick and tickless automatically
3. No time drift in tickless mode
4. Support critmon arch API automatically

arch/Kconfig

@@ -72,6 +72,8 @@ config ARCH_SIM
 	select ARCH_HAVE_POWEROFF
 	select ARCH_HAVE_TESTSET
 	select ARCH_NOINTC
+	select ALARM_ARCH
+	select ONESHOT
 	select SERIAL_CONSOLE
 	---help---
 		Linux/Cywgin user-mode simulation.