fea(pytests): Added gemma/gemma2 HF pytests

[imangohari1]

What does this PR do?

Added the HF upstream pytests for gemma and gemma2.

Tests

PT_HPU_LAZY_MODE=1 RUN_SLOW=true python -m pytest --device gaudi2 tests/transformers/tests/models/gemma2/ -s -v

========================================================== 113 passed, 74 skipped, 13 warnings in 15.52s ===========================================================

PT_HPU_LAZY_MODE=1 RUN_SLOW=true python -m pytest --device gaudi2 tests/transformers/tests/models/gemma/ -s -v
=========================================================== 58 passed, 39 skipped, 9 warnings in 10.32s ============================================================

Fixes # (issue)

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?

[imangohari1]

@regisss @astachowiczhabana FYI on this.

[regisss]

LGTM, I just left a nit.
Since these tests are not part of HF's CI, waiting for @astachowiczhabana's approval before merging.

[imangohari1]

LGTM, I just left a nit. Since these tests are not part of HF's CI, waiting for @astachowiczhabana's approval before merging.

of course @regisss. I addressed your comment.

[HuggingFaceDocBuilderDev]

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[imangohari1]

@astachowiczhabana CC @regisss
Hi adam,
can we review this and merge it? it is working all fine now. WDYT?

[astachowiczhabana]

LGTM too,
"Next Synapse Release Validation" is now failing on unrelated matters

[astachowiczhabana]

@regisss can we merge this?

[regisss]

LGTM