feat(boolean): add raw parts methods to the ClientKey

[IceTDrinker]

PR content/description

While working on forward compatibility it appears that some struct have no way of being deconstructed and reconstructed for data migration purposes.

This PR is a very small example on the boolean::ClientKey to align on the design of these APIs. Expect a lot of small PRs with a similar goal and once we agree here on the design, a very similar design.

This current patch is aimed at the release/0.4.x branch but will also be added to the main branch as the APIs to reconstruct will be used for data migration from 0.4 to 0.5 and later on deconstruction primitives will be used for migration from 0.5 to 0.6

added:

• into_raw_parts allows to deconstruct a ClientKey
• new_from_raw_parts allows to construct a ClientKey

Check-list:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
  * [ ] Relevant issues are marked as resolved/closed, related issues are linked in the description
• Check for breaking changes (including serialization changes) and add them to commit message following the conventional commit specification

[github-actions]

@slab-ci cpu_fast_test

[github-actions]

@slab-ci cpu_fast_test

[github-actions]

Pull Request has been approved 🎉
Launching full test suite...
@slab-ci cpu_test
@slab-ci cpu_integer_test
@slab-ci cpu_multi_bit_test
@slab-ci cpu_wasm_test
@slab-ci csprng_randomness_testing