[asan] Optimize Quarantine of secondary allocations

For the secondary allocation we don't need poison and fill memory if we
skip quarantine, and we don't need to poison after quarantine. In both
cases the secondary allocator will unmap memory and unpoison the shadow
from get_allocator().Deallocate().

Depends on D153496.

Reviewed By: thurston

Differential Revision: https://reviews.llvm.org/D153497