[v2.11.1] Switch to new iris >= 3.10.0 API

[schlunma]

Description

Iris introduces a couple new features and also some breaking changes in v3.10.0:

• iris.experimental.ugrid is deprecated in favor for iris.mesh
• Mesh is now called MeshXY
• Keyword arguments for MeshXY.coord() have changed
• broadcast_to_shape now supports chunk argument (we can remove our custom solution)
• area_weights calculation is now lazy (we can remove our custom solution)

I opted for pinning iris instead of making it backwards-compatible so we can use all new features, which allows us to remove lots of lines in our code.

Addresses #2492

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.70%. Comparing base (f969e82) to head (3a7a180).
Report is 48 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2500   +/-   ##
=======================================
  Coverage   94.69%   94.70%           
=======================================
  Files         248      248           
  Lines       14071    14001   -70     
=======================================
- Hits        13324    13259   -65     
+ Misses        747      742    -5     

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[valeriupredoi]

excellent, many thanks for taking on this one, Manu! Lemme know when you need a review 🍺

[valeriupredoi]

just adding a placeholder review suggestion so we don't end up with that iris RC channel in main 😁

[valeriupredoi]

remember to pin it in setup.py too

[schlunma]

Since iris released v.3.10.0 today, this is ready for review now!

[valeriupredoi]

will do a more reviewey review tomorrow, in the meantime, be advised of this for future rc_iris stuffs conda-forge/iris-feedstock#115

[valeriupredoi]

no problems at all from my side, very nice and sound PR, Manu 🍺 Only thing we have to be careful is if anyone develops a diagnostic using the main of ESMValCore (so in full development way) then wants it deployed in Tool - we'll have to tell them to wait for a Core release, but let's bridge that bridge if we get there

[schlunma]

@bouweandela please merge if you're happy with this 👍

[schlunma]

Thanks V for reviewing 🍻