fix, refactor, chore(egen): removes keras3 dependency error while saving the model, refactors code as per template

[sumanvita-springml]

This PR includes the following changes:

1. In the training component, changes base image from ""tensorflow/tensorflow:latest" to "tensorflow/tensorflow" to download last stable version of TF.
2. Changes model.save() to tf.saved_model.save() to resolve keras3 dependency issue
3. Changes REGION to LOCATION
4. Includes colab restart kernal and authentication as per template guidelines
5. Adds code to delete custom job in cleanup section
6. Changes the order of Github and workbench logos
7. Made structural changes according to the new notebook template

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[gericdong]

/gcbrun

[kittyabs]

no edits needed

[kittyabs]

suggested edits

[kittyabs]

backticks for CustomJob ??

[sumanvita-springml]

It is a comment in the code cell. Changed CustomJob to Custom Job.

[katiemn]

/gcbrun