Moving the time interpolation down to within _Interpolator functions #691

Job	Run time
mypy	3m 27s
py3.13 \| macos \| integration tests	14m 27s
py3.13 \| macos \| unit tests	7m 59s
py3.13 \| ubuntu \| unit tests	9m 13s
py3.13 \| ubuntu \| integration tests	16m 29s
py3.13 \| windows \| unit tests	14m 44s
py3.13 \| windows \| integration tests	27m 51s
py3.10 \| ubuntu \| unit tests	10m 12s
py3.10 \| ubuntu \| integration tests	15m 43s
py3.11 \| ubuntu \| unit tests	9m 38s
py3.12 \| ubuntu \| unit tests	9m 50s
merge-test-artifacts	0s
	2h 19m 33s

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