kernel: remove cmsis-rtos layering violation

We shouldn't be calling hooks from optional and upper layer subsystems
in the kernel, instead, just call the hook to set thread status in the
API where it is needed.

This now clears related bit in cmsis thread status bitarray when
terminating a thread in the cmsis rtos v1 layer directly and not in the
kenrel code.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>