* remove unique_ptr from allocator static allocation

* - for default allocator return address of the static object on stack instead of returning ptr to dynamically allocated object

* Revert "- for default allocator return address of the static object on stack instead of returning ptr to dynamically allocated object"

This reverts commit 126b269cb298e6eb8b99b1b9a90d5aa7cf8fb948.

* use raw pointer in set_host_memory_allocator

* fix build error