[OpenVINO Backend]: support numpy.ndim (#21176)

* feat: support numpy.ndim

Signed-off-by: 11happy <[email protected]>

* use shapeof shapeof method

Signed-off-by: 11happy <[email protected]>

---------

Signed-off-by: 11happy <[email protected]>

Author: 11happy

Diff for: keras/src/backend/openvino/excluded_concrete_tests.txt

@@ -98,7 +98,6 @@ NumpyOneInputOpsCorrectnessTest::test_meshgrid
 NumpyOneInputOpsCorrectnessTest::test_min
 NumpyOneInputOpsCorrectnessTest::test_moveaxis
 NumpyOneInputOpsCorrectnessTest::test_nan_to_num
-NumpyOneInputOpsCorrectnessTest::test_ndim
 NumpyOneInputOpsCorrectnessTest::test_nonzero
 NumpyOneInputOpsCorrectnessTest::test_pad_float16_constant_2
 NumpyOneInputOpsCorrectnessTest::test_pad_float32_constant_2

Diff for: keras/src/backend/openvino/numpy.py

@@ -1036,7 +1036,10 @@ def nan_to_num(x, nan=0.0, posinf=None, neginf=None):
 
 
 def ndim(x):
-    raise NotImplementedError("`ndim` is not supported with openvino backend")
+    x = get_ov_output(x)
+    x_shape = ov_opset.shape_of(x).output(0)
+    x_dim = ov_opset.shape_of(x_shape, "i64")
+    return x_dim
 
 
 def nonzero(x):