[PATCH v3 05/23] posix-timers:Convert to the 64bit methods for the timer_gettime syscall function

This patch introduces the timer_get64 method with itimerspec64 type for k_clock structure, that makes it ready for the 2038 year. Convert to the 64bit method with itimerspec64 type for the timer_gettime syscall function, and change the timer_gettime syscall implementation according to the

[PATCH v3 05/23] posix-timers:Convert to the 64bit methods for the timer_gettime syscall function

This patch introduces the timer_get64 method with itimerspec64 type for k_clock structure, that makes it ready for the 2038 year. Convert to the 64bit method with itimerspec64 type for the timer_gettime syscall function, and change the timer_gettime syscall implementation according to the