Implement printing of usm_ndarray contents

[ndgrigorian]

import dpctl.tensor as dpt
dpt.arange(0, 45)

Results in a reference to the object and its address, i.e.,
<dpctl.tensor._usmarray.usm_ndarray object at 0x7f6be7d4c890>
is what I see.

Instead, it should print a result similar to what one gets when calling dpt.asnumpy on the above, i.e.,

array([ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16,
       17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
       34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44])