Add more asan support to the odin runtime and begin sanitizing

allocators

This adds various bindings to the asan runtime which can be used
to poison/unpoison memory handed out by various allocators. This
means we can catch use after free memory bugs when using operations
such as free_all during runtime.

Asan poisoning are added for the follow allocators in mem:
Arena (including temporary arenas)
Scratch
Stack
Small_Stack

Additionally a bug in the stack allocator was fixed to disallow freeing
in the middle of the stack (caught by the asan!).

I plan on adding support for all the allocators in core. This is just
a good starting point and were some of the easiest ones to implement
asan for.

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