Added fix for wrong units of `clt` for CIESM and FIO-ESM-2-0

[schlunma]

Description

Units of input data claim to be %, but they are 1. This PR adds a fix for that.

Tested this myself thoroughly.

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Checklist

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[codecov[bot]]

Codecov Report

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

Comparison is base (6f879cf) 93.81% compared to head (572237d) 93.82%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2330 +/- ## ======================================= Coverage 93.81% 93.82% ======================================= Files 240 240 Lines 13281 13293 +12 ======================================= + Hits 12460 12472 +12 Misses 821 821 ```

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