Remove `indices` keyword from FieldSet and Field #695

Job	Run time
mypy	3m 30s
py3.13 \| macos \| unit tests	8m 51s
py3.13 \| macos \| integration tests	12m 7s
py3.13 \| ubuntu \| unit tests	10m 5s
py3.13 \| ubuntu \| integration tests	18m 3s
py3.13 \| windows \| unit tests	14m 21s
py3.13 \| windows \| integration tests	27m 13s
py3.10 \| ubuntu \| unit tests	10m 56s
py3.10 \| ubuntu \| integration tests	16m 58s
py3.11 \| ubuntu \| unit tests	10m 22s
py3.12 \| ubuntu \| unit tests	10m 41s
merge-test-artifacts	4s
	2h 23m 11s

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