Moving the time interpolation down to within _Interpolator functions #666

Job	Run time
mypy	3m 40s
py3.13 \| macos \| integration tests	11m 52s
py3.13 \| macos \| unit tests	7m 58s
py3.13 \| ubuntu \| integration tests	13m 34s
py3.13 \| ubuntu \| unit tests	9m 40s
py3.13 \| windows \| integration tests	24m 31s
py3.13 \| windows \| unit tests	12m 21s
py3.10 \| ubuntu \| integration tests	13m 31s
py3.10 \| ubuntu \| unit tests	10m 36s
py3.11 \| ubuntu \| unit tests	10m 8s
py3.12 \| ubuntu \| unit tests	9m 51s
merge-test-artifacts	0s
	2h 7m 42s

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