Replaced constructor with dtype 'd' with call to ones to dynamically figure out the data type appropriate for the device

Author: oleksandr-pavlyk

dpctl/tests/test_usm_ndarray_operators.py

@@ -49,7 +49,7 @@ def multiply(a, b):
 
 @pytest.mark.parametrize("namespace", [None, Dummy()])
 def test_fp_ops(namespace):
-    X = dpt.usm_ndarray(1, "d")
+    X = dpt.ones(1)
     X._set_namespace(namespace)
     assert X.__array_namespace__() is namespace
     X[0] = -2.5