Remove timestamps keyword from Field and FieldSet #692

Job	Run time
mypy	3m 12s
py3.13 \| macos \| integration tests	12m 55s
py3.13 \| macos \| unit tests	7m 23s
py3.13 \| ubuntu \| integration tests	13m 39s
py3.13 \| ubuntu \| unit tests	10m 0s
py3.13 \| windows \| integration tests	23m 39s
py3.13 \| windows \| unit tests	14m 5s
py3.10 \| ubuntu \| integration tests	15m 14s
py3.10 \| ubuntu \| unit tests	10m 29s
py3.11 \| ubuntu \| unit tests	10m 26s
py3.12 \| ubuntu \| unit tests	10m 24s
merge-test-artifacts	0s
	2h 11m 26s

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