Moving the time interpolation down to within _Interpolator functions #641

Job	Run time
mypy	3m 25s
py3.13 \| macos \| integration tests	15m 24s
py3.13 \| macos \| unit tests	8m 35s
py3.13 \| ubuntu \| integration tests	24m 33s
py3.13 \| ubuntu \| unit tests	10m 31s
py3.13 \| windows \| integration tests	24m 51s
py3.13 \| windows \| unit tests	13m 1s
py3.10 \| ubuntu \| integration tests	24m 43s
py3.10 \| ubuntu \| unit tests	11m 19s
py3.11 \| ubuntu \| unit tests	10m 51s
py3.12 \| ubuntu \| unit tests	10m 56s
merge-test-artifacts	2s
	2h 38m 11s

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