Resolve gh-1769

Modify shape.setter to handle integers.

```

In [1]: import dpctl.tensor as dpt

In [2]: x = dpt.ones((2, 3))

In [3]: x.shape = 6

In [4]: x
Out[4]: usm_ndarray([1., 1., 1., 1., 1., 1.], dtype=float32)

In [5]: x = dpt.ones((2, 3))

In [6]: class Six:
   ...:     def __init__(self, dim=1):
   ...:         self.v = (1,) * (dim - 1) + (6,)
   ...:     def __len__(self):
   ...:         return len(self.v)
   ...:     def __iter__(self):
   ...:         return iter(self.v)
   ...:

In [7]: x.shape = Six(3)

In [8]: x.shape
Out[8]: (1, 1, 6)
```

Author: oleksandr-pavlyk

dpctl/tensor/_usmarray.pyx

@@ -576,7 +576,11 @@ cdef class usm_ndarray:
 
         from ._reshape import reshaped_strides
 
-        new_nd = len(new_shape)
+        try:
+            new_nd = len(new_shape)
+        except TypeError:
+            new_nd = 1
+            new_shape = (new_shape,)
         try:
             new_shape = tuple(operator.index(dim) for dim in new_shape)
         except TypeError: