vera/ln_tuning add and test case add

[sywangyi]

What does this PR do?

Fixes # (issue)

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• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

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[regisss]

Please add a rule in

optimum-habana/tests/test_examples.py

Line 281 in 8263a4f

elif "ast-finetuned-speech-commands-v2" in model_name and IS_GAUDI2:

to make sure these tests are not executed on Gaudi1.