Example (nl_image_search.py) update to work with newer version of TF in Keras 2 compat mode.

[vinayak19th]

Multiple Bug fixes for the code to be usable with newer tf versions (tested with 2.19.0) under keras 2 compat mode :
Change log:

• Removed TF-Addons as it doesn't work with newer version and was only being used for the AdamW optimizer which is part of keras natively now
• Fixed tf.nn.gelu call : Changed tf.nn.gelu -> tf.keras.activations.gelu so that modern keras 2 backward compat can use it within the model api
• Updated the hub.KerasLayer calls to use the correct arguments
• Update training code to include steps per epoch : Updated the training code to have steps_per_epoch as a variable so that model.fit can show the total steps
• Fixed file loading and delete paths : Fixed the file paths to reflect the effect of the newer unzip process

[divyashreepathihalli]

Can you update this example for keras 3?

[vinayak19th]

Can you update this example for keras 3?

I was having an issue with the BERT model, but I can try fixing that later