Win tests

PR: Allow plugins to hook into `File > Open` #12902

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Run time

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Job	Run time
Windows - Py3.11, pip, fast	50m 28s
Windows - Py3.11, pip, slow	22m 39s
Windows - Py3.11, conda, fast	53m 1s
Windows - Py3.11, conda, slow	1h 30m 31s
	3h 36m 39s