Tests

add Preferences.jl-based configuration (#742) #1168

Job	Run time
Julia (1, macos-latest, @CondaPkg 3)	4m 2s
Python (3.10, windows-latest, @JuliaPkg)	2m 23s
Python (3.10, macos-latest, @JuliaPkg)	2m 17s
Python (3, ubuntu-latest, @JuliaPkg)	1m 32s
Julia (1.10, macos-latest, @CondaPkg 3)	3m 15s
Julia (1, windows-latest, @CondaPkg 3)	7m 29s
Python (3, macos-latest, @JuliaPkg)	1m 33s
Python (3.14t, ubuntu-latest, @JuliaPkg)	1m 59s
Julia (1, ubuntu-latest, python 3)	3m 56s
Julia (1, ubuntu-latest, @CondaPkg 3)	4m 59s
Julia (1, ubuntu-latest, python 3.14t)	4m 48s
Julia (1.10, ubuntu-latest, @CondaPkg 3)	2m 56s
Python (3, windows-latest, @JuliaPkg)	2m 15s
Python (3.10, ubuntu-latest, @JuliaPkg)	1m 31s
Python (3, ubuntu-latest, julia)	1m 34s
Julia (1.10, windows-latest, @CondaPkg 3)	7m 8s
	53m 37s

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