Move `_resolve_rcond` from `solvers/recombination.py` to `utils.py`

[tc85324]

What's the new feature?

Once #504 has been merged, the _resolve_rcond function can be moved into utils.py and made into a package wide utility (this requires adding new tests and some minor refactoring).

What value does this add?

Allows for better code reuse (minimises duplication)

Is there an alternative you've considered?

No response

Additional context

No response