shell: kernel: also print the thread entry pointer
shell: kernel: also print the thread entry pointer

Sometimes it is hard to tell which instance of a thread is which
in the printed list, based solely on the name (if present) and
the k_thread pointer, so also print the thread entry fn pointer.

Signed-off-by: Pete Skeggs <7623f482543c6b98f7c630b0491057372eca75e9@nordicsemi.no>

nashif/zephyr,Vudentz/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,finikorg/zephyr,Vudentz/zephyr,nashif/zephyr,finikorg/zephyr,Vudentz/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,Vudentz/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,nashif/zephyr,galak/zephyr,Vudentz/zephyr