Feature/add probabilistic iterative methods

[gw265981]

PR Type

• Feature

Description

Adds the reduce_iterative() method to KernelHerding. Closes #977.

How Has This Been Tested?

Existing tests pass as expected.

New tests introduced with this change verify that reduce_iterative() works correctly. Due to the probabilistic nature of the solver when probabilistic=True, the exact behaviour is hard to verify, hence the test replaces jax.random.choice with a deterministic choice function.

Does this PR introduce a breaking change?

No.

Checklist before requesting a review

• I have made sure that my PR is not a duplicate.
• My code follows the style guidelines of this project.
• I have ensured my code is easy to understand, including docstrings and comments where necessary.
• I have performed a self-review of my code.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.
• I have updated CHANGELOG.md, if appropriate.

[github-actions]

Performance review

Commit 6a3dcfd - Merge e0eca31 into 18ef363

No significant changes to performance.