This change helps in achieving the following:
- Moves the OS specific code from scheduler_imp.cpp to os specific
files.
- Frees any drm resource, including level zero's before enabling/dis
-abling Debug mode. And once Debug mode is toggled, reinitialize of
level zero occurs.
- If current mode is Debug mode and any other mode is requested by user,
then new mode will be made effective by unsetting debug mode.
Related-To: LOCI-866
Signed-off-by: Jitendra Sharma <jitendra.sharma@intel.com>