Performance Test Case : Allocate heap memory on DX backend

[Liiii007]

TODO:

• Test create different size of buffer with stats
• Test create different size of buffer with committed resource or placed resource
• Add video memory statistics
• Add fragmentation statistics
• Try add some allocator(e.g. Buddy allocator/Free List allocator) for performance test
• Try add defrag interface and config(dx_config_ext)