Remove `indices` keyword from FieldSet and Field #685

Job	Run time
mypy	3m 40s
py3.13 \| macos \| integration tests	15m 21s
py3.13 \| macos \| unit tests	8m 49s
py3.13 \| ubuntu \| integration tests	16m 55s
py3.13 \| ubuntu \| unit tests	10m 29s
py3.13 \| windows \| integration tests	31m 46s
py3.13 \| windows \| unit tests	12m 32s
py3.10 \| ubuntu \| integration tests	17m 36s
py3.10 \| ubuntu \| unit tests	10m 45s
py3.11 \| ubuntu \| unit tests	10m 16s
py3.12 \| ubuntu \| unit tests	10m 35s
merge-test-artifacts	0s
	2h 28m 44s

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