Update HadISST cmorizer with recent years

[remi-kazeroni]

Description

This PR updates the HadISST CMORizer to account for more recent years now available and automatically downloadable with esmvaltool data download HadISST.

• Closes Update CMORizer for HadISST to extend available data  #3022

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New or updated data reformatting script

• 🛠 Documentation is available
• 🛠 The dataset has been added to the CMOR check recipe
• 🧪 Numbers and units of the data look physically meaningful

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[valeriupredoi]

ha! I finally get to approve an OBS PR myself, take that, Remi - ow wait.. 😆

[axel-lauer]

Looks good!

[remi-kazeroni]

Thanks for the reviews @valeriupredoi and @axel-lauer 👍