feat: RoPE-related typing improvements

[RyanMullins]

What does this PR do?

Fixes #41964

• Sets total=False on RopeParameters
• Applies Required to the relevant properties of RopeParameters
• More coming soon...

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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• Was this discussed/approved via a Github issue or the forum? Please add a link
  to it if that's the case. Improve typing support and flexibility for RopeParameters #41964
• Did you make sure to update the documentation with your changes? Here are the
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  here are tips on formatting docstrings.
• Did you write any new necessary tests?

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[Rocketknight1]

LGTM but cc @zucchini-nlp @ArthurZucker!

[github-actions]

[For maintainers] Suggested jobs to run (before merge)

run-slow: gemma3