Fixed units of cl test data (necessary since iris>=3.8.0)

[schlunma]

Description

This only affects the test data, no real data as far as I can tell. All affected recipes (the ones I know of) run successfully.

Proper fix of #2357

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.44%. Comparing base (31be51b) to head (6a4a78e).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2403 +/- ## ========================================== + Coverage 94.38% 94.44% +0.05% ========================================== Files 246 246 Lines 13743 13743 ========================================== + Hits 12971 12979 +8 + Misses 772 764 -8 ```

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