Fix oh for model: EC-Earth3-AerChem mip: AERMonZ

[valeriupredoi]

Description

Closes #2613

Link to documentation: no need

We discussed this issue at large in #2613 and the solution proposed by Manu @schlunma is implemented here, ie set the ps' standard_name (variable at issue is oh: "mole_fraction_of_hydroxyl_radical_in_air" in AERmonZ) to surface_air_pressure to avoid two coordinated with the same standard name air_pressure.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.97%. Comparing base (542a374) to head (ea8c87b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2634   +/-   ##
=======================================
  Coverage   94.96%   94.97%           
=======================================
  Files         253      253           
  Lines       14706    14714    +8     
=======================================
+ Hits        13966    13974    +8     
  Misses        740      740           

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[valeriupredoi]

NB Mme Michou's recipe
now runs fine 😃

[schlunma]

One tiny comment on the docstring, apart from that it looks good! Cheers 🚀

[valeriupredoi]

thanks a lot, gents! 🍻