Various QuickLook fixes and enhancements of surface plot functionality.

[jwarner8]

Addresses #1062.

• Fixes missing stash conversions from Pauls list for a full set of diagnostics for RAL3-LFRic comparisons
• Adds regridding capability for a limited set of variables that use different grid staggerings in the UM (wind)
• Adds various callbacks to promote long_name, fix radiation and lightning time points.
• Adds support for rotated GeogCS grids (iris copes with this OK and produces sensible results)
• Add cell method constraint for surface_variables.
• Updates tests

Contribution checklist

Aim to have all relevant checks ticked off before merging. See the developer's guide for more detail.

• Documentation has been updated to reflect change.
• New code has tests, and affected old tests have been updated.
• All tests and CI checks pass.
• Ensured the pull request title is descriptive.
• Conda lock files have been updated if dependencies have changed.
• Attributed any Generative AI, such as GitHub Copilot, used in this PR.
• Marked the PR as ready to review.

[jwarner8]

Note: we currently look for variables with no cell_methods. This could become difficult if we want to compare time-meaned variables in the future.

[github-actions]

[jwarner8]

Nice (SURFACE VARIABLE TESTING)

There were 6 failures, which were related to the following variables;

eastward_wind_at_10m. There is an extra gridpoint in the latitude direction (649 vs 648) in LFRic. Suspect due to whether variable on corners of cell, or center. Encountered before. Might need a callback fix (longer term needs a regrid).
nortward_wind_at_10m. Same as above.

toa_upward_longwave_flux_radiative_timestep. UM outputs at 1 minute past every hour, rather than on hour, so they are not directly compatible. Same with surface_net_longwave_flux_radiative_timestep, surface_downward_longwave_flux, surface_downward_shortwave_flux. So difference cant find any corresponding points to compare, and so produces no difference.

[jwarner8]

Update 11/02: All surface variables working, but need to update and tidy code and add new tests.

[Sylviabohnenstengel]

surface_temperature has colourbar in degreeC and data in K. Need to change "surface_temperature": {
"max": 30.0,
"min": 20.0
},

into kelvin values

[jfrost-mo]

Overall looks good. There needs to be an additional test for regridding during the difference plot, and there are a few minor code suggestions.

[jwarner8]

Have added a test for regridding, not sure what to assert other than it didn't fail and successfully regridded, and thus returned a cube, so using type?

[jfrost-mo]

Suggestion for test conditions.

[jfrost-mo]

Looking good!