Alias KerasTensor as Tensor

[rivershah]

Can we please introduce an alias from KerasTensor to Tensor in keras by changing the import statement in the autogenerated stubs:

from keras.src.backend.common.keras_tensor import KerasTensor as KerasTensor

to:

from keras.src.backend.common.keras_tensor import KerasTensor as Tensor

This change aims to simplify the API, improve usability, and align naming convention across other critical building blocks such as keras.Model and keras.Layer

For example :
from keras import Model, Layer, Tensor, ops

This would be a trivial change downstream too but just think for the sake of alignment, we refactor in keras main repo