Update Rust crate curve25519-dalek to v5

[projectorigin-renovate]

This PR contains the following updates:

Package	Type	Update	Change
curve25519-dalek (source)	dependencies	major	4.1.2 → 5.0.0

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Release Notes

dalek-cryptography/curve25519-dalek (curve25519-dalek)

v5.0.0

Breaking Changes

• Update edition to 2024
• Update the MSRV from 1.60 to 1.85
• Remove group-bits feature due to soundness issues with underlying trait (#​909)
• Re-export rand_core (#​908)
• Rename Scalar::batch_invert -> Scalar::invert_batch for consistency. Also make it no-alloc. (#​789)
• Remove deprecated functions FieldElement::as_bytes() and EdwardsPoint::nonspec_map_to_curve() (#​778)
• Upgrade rand_core dependency to v0.10.0
• Upgrade digest and sha2 deps

Other Changes

• Perf: Use maximum available NAF window size in VartimePrecomputedStraus (#​848)
• Perf: Skip checking 8 candidate points in RistrettoPoint::lizard_decode (#​882)
• Add Lizard bytes-to-point injection for Ristretto. Gated under lizard feature. (#​826)
• Add an allocating batch inversion called Scalar::invert_batch_alloc (#​789)
• Add Scalar::div_by_2 (#​805)
• Add EdwardsPoint::hash_to_curve (#​786)
• Undeprecate Scalar::from_bits() (#​780)
• Use constant-time equality testing for compressed Ristretto and Edwards points, rather than autoderived equality

v4.2.0

NOTE: yanked because hash_to_curve was improperly implemented (#​785)

• Move AVX-512 backend selection logic to a separate CFG flag that requires nightly
• Add Elligator2 hashing methods EdwardsPoint::hash_to_curve() and FieldElement::hash_to_field()
• Deprecate FieldElement::as_bytes in favor of FieldElement::to_bytes
• Remove deprecated FieldElement::as_bytes
• Add batch conversion function EdwardsPoint::to_montgomery_batch()
• Make VartimePrecomputedStraus::optional_mixed_multiscalar_mul() and VartimeRistrettoPrecomputation::vartime_mixed_multiscalar_mul() accept more points than static scalars

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