Tests

Fix nested flowsheet time domain construction #7262

Job	Run time
Compatibility tests	4m 36s
Check Spelling	9s
Check code formatting (Black)	32s
Build Sphinx docs	5m 38s
pytest (py3.9/linux)	22m 6s
Pylint	4m 27s
pytest (py3.9/win64)	32m 13s
pytest (py3.10/linux)	14m 15s
pytest (py3.10/win64)	31m 35s
pytest (py3.11/linux)	20m 18s
pytest (py3.11/win64)	26m 14s
pytest (py3.12/linux)	12m 50s
pytest (py3.12/win64)	28m 19s
Upload coverage report (Codecov)	0s
	3h 23m 12s

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