Moving the time interpolation down to within _Interpolator functions #676

Job	Run time
mypy	3m 58s
py3.13 \| macos \| integration tests	12m 38s
py3.13 \| macos \| unit tests	8m 5s
py3.13 \| ubuntu \| integration tests	26m 8s
py3.13 \| ubuntu \| unit tests	9m 24s
py3.13 \| windows \| integration tests	22m 25s
py3.13 \| windows \| unit tests	10m 49s
py3.10 \| ubuntu \| integration tests	13m 38s
py3.10 \| ubuntu \| unit tests	10m 7s
py3.11 \| ubuntu \| unit tests	9m 51s
py3.12 \| ubuntu \| unit tests	10m 2s
merge-test-artifacts	3s
	2h 17m 8s

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