_Memory object should implement sycl_queue property

[oleksandr-pavlyk]

In [31]: dpm.as_usm_memory(dpnp.random.rand(10)).sycl_queue
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-31-702eb30a669d> in <module>
----> 1 dpm.as_usm_memory(dpnp.random.rand(10)).sycl_queue

AttributeError: 'dpctl.memory._memory.MemoryUSMDevice' object has no attribute 'sycl_queue'

In [32]: dpm.as_usm_memory(dpnp.random.rand(10))._queue
Out[32]: <dpctl.SyclQueue at 0x7fcb7ac80140>