Memory manager features

[PokhodenkoSA]

A list of related issues:

• Make methods of Memory class for copy to and from another objects Make methods of Memory class for copy to and from another objects #76
• Expose the USM fine-grained control functions mem_advise and prefetch in the C API Expose the USM fine-grained control functions mem_advise and prefetch in the C API #45
• Expose USM aligned_alloc* functions Expose USM aligned_alloc* functions #43
• Compare USM with RMM Compare USM with RMM #126

[diptorupd]

Refer #152

[oleksandr-pavlyk]

All of these issue are addressed in #152