Add climate drivers for fire diagnostic

[bouweandela]

Description

Add climate drivers for fire diagnostic.

Also updates the sample data version from 0.7.1 to 0.7.2.

Sample data available in Climate-REF/ref-sample-data#48

Checklist

Please confirm that this pull request has done the following:

• Tests added
• Documentation added (where applicable)
• Changelog item added to changelog/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Files with missing lines	Coverage Δ
...src/climate_ref_esmvaltool/diagnostics/__init__.py	100.00% <100.00%> (ø)
...esmvaltool/diagnostics/climate_drivers_for_fire.py	100.00% <100.00%> (ø)
...ef-esmvaltool/src/climate_ref_esmvaltool/recipe.py	94.59% <100.00%> (ø)
packages/climate-ref/src/climate_ref/testing.py	63.26% <100.00%> (ø)

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[lewisjared]

We might need to document how to manage upgrading the REF (at some stage)

[bouweandela]

We already have a small snippet with the command to update the conda-lock file from this file here: https://climate-ref.readthedocs.io/en/latest/development/#installing-metric-provider-dependencies. Maybe it just needs another sentence to explain the links. The reason why I had to add arviz here is that it has been added as a dependency of ESMValTool after the latest release. I'll remove it again when we update to ESMValTool v2.13.

[bouweandela]

Thank you for reviewing 🥳