added the required features

Author: Raghavyadav17

keras/src/backend/openvino/excluded_concrete_tests.txt

@@ -93,7 +93,7 @@ NumpyOneInputOpsCorrectnessTest::test_diag
 NumpyOneInputOpsCorrectnessTest::test_diagonal
 NumpyOneInputOpsCorrectnessTest::test_exp2
 NumpyOneInputOpsCorrectnessTest::test_expm1
-NumpyOneInputOpsCorrectnessTest::test_flip
+
 NumpyOneInputOpsCorrectnessTest::test_floor_divide
 NumpyOneInputOpsCorrectnessTest::test_hstack
 NumpyOneInputOpsCorrectnessTest::test_imag

keras/src/backend/openvino/numpy.py

@@ -707,7 +707,16 @@ def expm1(x):
 
 
 def flip(x, axis=None):
-    raise NotImplementedError("`flip` is not supported with openvino backend")
+    rank=len(x.shape)
+
+    if axis is None:
+        axis=list(range(rank))
+
+
+    axis_tensor=np.array(axis,dtype=np.int32)
+    reversed_tensor=ov_opset.Reverse(x,axis_tensor)
+
+    return reversed_tensor
 
 
 def floor(x):