Deprecate / Remove old allocators

[alliepiper]

Everything should be going through the new MR allocation layer.

Overview

Construct	Resolution	Replacement
device_new_allocator	Deprecate	device_allocator
device_malloc_allocator	Deprecate	device_allocator
cuda::experimental::pinned_allocator	Remove	universal_host_pinned_allocator
detail::temporary_allocator	Remove	thrust::async style temporary allocation
detail::temporary_array	Remove	thrust::async style temporary allocation
thrust::(get/return)_temporary_buffer	Remove	thrust::async style temporary allocation
detail::malloc_allocator	Remove	host_allocator
detail::tagged_allocator	Remove	(None, impl detail)
device_free/device_malloc	Keep	N/A
device_new/device_delete	Keep	N/A

Usages:

device_new_allocator

Unused.

device_malloc_allocator

• vector.cu (Unused include?)
• uninitialized_copy.cu (Unused include?)
• uninitialized_fill.cu (Unused include?)
• allocator.cu
• vector_insert.cu

device_new

• ASSERT_STATIC_ASSERT in runtime_static_assert
• device_make_unique

device_malloc

• device_new
• testing/for_each.cu
• unwrap_pointer.cu
• examples/device_ptr.cu
• testing/adjacent_difference.cu
• testing/copy.cu
• cpp/adjacent_difference.cu
• cuda/adjacent_difference.cu
• testing/equal.cu
• testing/inner_product.cu
• testing/scan.cu (unused?)
• testing/uninitialized_fill.cu

cuda::experimental::pinned_allocator

• pinned_allocator.cu

temporary_allocator

• temporary_array

get_temporary_buffer

• execute_with_allocator.h defines thrust::detail::(get|return)_temporary_buffer
• Doc'd in thrust/memory.h
• dispatch logic in detail/adl/temporary_buffer.h
• detail/generic/temporary_buffer.(h|inl)
• custom_temporary_allocation.cu (mentioned in comments, but doesn't seem to actually be used at a glance)
• allocator_aware_policies.cu
• cuda/memory.cu
• testing/memory.cu

Unresolved Issues

• Do we want to keep the device_new/free/malloc functions?
• Replacement for temporary_allocator?
• Keep or remove temporary_array?
• Keep or remove (get|return)_temporary_buffer?