Add `FieldSet.from_sgrid_conventions()` #1991

Job	Run time
cache-pixi-lock / Generate output	15s
Unit tests: ubuntu \| pixi run -e test-minimum tests	3m 43s
Unit tests: ubuntu \| pixi run -e test tests	2m 34s
Unit tests: windows \| pixi run -e test tests	6m 30s
Unit tests: ubuntu \| pixi run -e test-py311 tests	4m 20s
Unit tests: ubuntu \| pixi run -e test-py313 tests	3m 44s
TypeChecking: pixi run typing	0s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	0s
merge-test-artifacts	0s
cache-pixi-lock / Generate output	15s
Unit tests: ubuntu \| pixi run -e test-py311 tests	1m 58s
Unit tests: ubuntu \| pixi run -e test tests	2m 34s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	-1249s
Unit tests: ubuntu \| pixi run -e test-py313 tests	3m 44s
Unit tests: windows \| pixi run -e test tests	6m 30s
TypeChecking: pixi run typing	-1249s
Unit tests: ubuntu \| pixi run -e test-minimum tests	3m 43s
merge-test-artifacts	1s
	-107s

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