Fix for Mixtral G1 pytest failures

[12010486]

What does this PR do?

Fixes for the following pytests on Gaudi1:

MixtralModelTest::test_contrastive_generate
MixtralModelTest::test_contrastive_generate_dynamic_shapes
MixtralModelTest::test_contrastive_generate_low_memory
MixtralModelTest::test_determinism
MixtralModelTest::test_feed_forward_chunking
MixtralModelTest::test_generate_from_inputs_embeds_decoder_only
MixtralModelTest::test_generate_without_input_ids
MixtralModelTest::test_greedy_generate
MixtralModelTest::test_left_padding_compatibility
MixtralModelTest::test_load_balancing_loss
MixtralModelTest::test_sample_generate
MixtralModelTest::test_save_load MixtralModelTest::test_resize_embeddings_untied

Modified the optimum/habana/utils.py
Included Gaudi3 in get_device_name()

Before submitting

• 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?

Tested on G1/G2/G3

[12010486]

@libinta, @imangohari1, if you want to have a look

[regisss]

@12010486 Is this PR different from #1654 ?

[12010486]

No, it is basically the same, except for make style that here is included. However, I have not received confirmation yet on which PR to keep