* move all ObjC (via metal-cpp) interaction until post static initializers
- metal-cpp relies on static initializers to cache class and selector pointers
- code in mlx was using metal-cpp to set up NSAutoreleasePools during its own static init time
- but this code was silently failing as the class and selector pointers from metal-cpp were still nil
- defer the creation of NSAutoreleasePools until after static init time
- ensure that we have coverage where autorelease pools are needed
* Update device.cpp
remove commented code
* Update device.cpp
remove commented out code
* Update scheduler.h
update comment
* per discussion use the pool inside the task() -- this will be metal only, not needed for cpu
* Update allocator.cpp
move pool to release/alloc area
