arch: arm: re-organize arm fault handling
arch: arm: re-organize arm fault handling

This commit does several things:
- It unifies the way the fault inspection is implemented,
  irrespective of the selected fault dumping level.
- It removes the dumping of the Thread ID and faulting
  instruction address, as these are now displayed by
  _NanoFatalErrorHandler.
- It introduces a new debug print directive, to be used
  for the highest dumping level (2).

Signed-off-by: Ioannis Glaropoulos <5921cc8bab7e1d4329f52fd8f6268f9692e3de80@nordicsemi.no>

Vudentz/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,explora26/zephyr,galak/zephyr,explora26/zephyr,finikorg/zephyr,kraj/zephyr,explora26/zephyr,finikorg/zephyr,finikorg/zephyr,explora26/zephyr,punitvara/zephyr,nashif/zephyr,ldts/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,nashif/zephyr,galak/zephyr,kraj/zephyr,punitvara/zephyr,nashif/zephyr,Vudentz/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,ldts/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,kraj/zephyr,Vudentz/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,Vudentz/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,galak/zephyr,finikorg/zephyr,punitvara/zephyr,kraj/zephyr