Add support for hourly ICON data

[BauerJul]

Description

This pull request adds support for hourly ICON data. The old version of the code did not support this yet.

Checklist

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• 🧪 The new functionality is relevant and scientifically sound
• 🛠 This pull request has a descriptive title and labels
• 🛠 Code is written according to the code quality guidelines
• 🧪 and 🛠 Documentation is available
• 🛠 Unit tests have been added
• 🛠 Changes are backward compatible
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[codecov]

Codecov Report

Merging #1990 (1b9aa15) into main (72b4169) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 1b9aa15 differs from pull request most recent head 2f1f1bb. Consider uploading reports for the commit 2f1f1bb to get more accurate results

@@           Coverage Diff           @@
##             main    #1990   +/-   ##
=======================================
  Coverage   92.79%   92.80%           
=======================================
  Files         236      236           
  Lines       12438    12445    +7     
=======================================
+ Hits        11542    11549    +7     
  Misses        896      896           

Impacted Files	Coverage Δ
esmvalcore/cmor/_fixes/icon/icon.py	100.00% <100.00%> (ø)

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[schlunma]

Thanks @BauerJul for this great contribution! I tested this on real ICON data and it works very well; we can finally read hourly ICON data now! 🚀

A couple of very minor comments below about comments and line breaks. After that I will approve 👍

[schlunma]

Awesome, great stuff @BauerJul 🚀 Re-tested this with real ICON data, everything works flawlessly. This can be merged!

[valeriupredoi]

many thanks @BauerJul and @schlunma - I'll have a quick look over myself now, and will merge 🍺

[valeriupredoi]

very nice indeed! Just one text remark for the (very nicely) in-line commented code, which I am going to commit to spare you the extra hassle. Also, if you have an ORCID number you can add it later, no bother if you don't have one. Cheers 🍺

[valeriupredoi]

@BauerJul do you have an ORCID number by any chance?

[BauerJul]

@valeriupredoi I do not have an ORCID number yet

[valeriupredoi]

tests fail because of #1982 - nothing to do with this PR 👍

[BauerJul]

Thanks a lot for fixing the comment and for approving! @valeriupredoi