Tests

remove PYNULL_CACHE #1170

Job	Run time
Python (3, windows-latest, @JuliaPkg)	2m 17s
Python (3.10, ubuntu-latest, @JuliaPkg)	1m 40s
Python (3, ubuntu-latest, @JuliaPkg)	1m 31s
Python (3.10, macos-latest, @JuliaPkg)	1m 53s
Julia (1, windows-latest, @CondaPkg 3)	9m 57s
Julia (1.10, ubuntu-latest, @CondaPkg 3)	2m 55s
Python (3.14t, ubuntu-latest, @JuliaPkg)	1m 49s
Python (3, ubuntu-latest, julia)	1m 29s
Julia (1, ubuntu-latest, python 3.14t)	4m 1s
Python (3.10, windows-latest, @JuliaPkg)	2m 13s
Julia (1, macos-latest, @CondaPkg 3)	3m 30s
Julia (1.10, macos-latest, @CondaPkg 3)	3m 31s
Julia (1, ubuntu-latest, python 3)	3m 35s
Julia (1, ubuntu-latest, @CondaPkg 3)	3m 54s
Julia (1.10, windows-latest, @CondaPkg 3)	7m 16s
Python (3, macos-latest, @JuliaPkg)	1m 13s
	52m 44s

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