indexing op does not report out of bound indices

[eric-haibin-lin]

out of bound error is reported in numpy:

>>> import numpy as np
>>> np.ones((1,))[[10]]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: index 10 is out of bounds for axis 0 with size 1
>>>

but MXNet does not:

>>> import mxnet as mx
>>> mx.nd.ones((1,))[[10]]
[6.4e-44]
<NDArray 1 @cpu(0)>

We can reuse the kernel in nd.take(mode='raise') to report such an error.

@reminisce @haojin2 @hhexiy

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[kshitij12345]

@eric-haibin-lin ,

From a quick view,
take as of now doesn't actually support mode=raise,
https://github.com/apache/incubator-mxnet/blob/a8b9728d5729b565fdf2f588d1985bb5eca7f68a/src/operator/tensor/indexing_op.h#L671-L675

https://github.com/apache/incubator-mxnet/blob/a8b9728d5729b565fdf2f588d1985bb5eca7f68a/src/operator/tensor/indexing_op.h#L679-L709

So as of now, it doesn't actually raise out-of-bounds error.

[eric-haibin-lin]

Raise mode added in #15887