Ignored iris warnings about global attributes

[schlunma]

Description

One more new iris warning to ignore.

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Checklist

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• [x] 🧪 The new functionality is relevant and scientifically sound
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• [x] 🛠 Unit tests have been added
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[codecov[bot]]

Codecov Report

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

Project coverage is 94.38%. Comparing base (89891ef) to head (243a377).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2400 +/- ## ======================================= Coverage 94.38% 94.38% ======================================= Files 246 246 Lines 13737 13739 +2 ======================================= + Hits 12965 12967 +2 Misses 772 772 ```

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