Cleanup .gitignore files used in Python demos (#632) #1680

Job	Run time
rockylinux/rockylinux:10	2m 25s
macos-26	33m 38s
windows-2022	21m 36s
ubuntu-24.04	15m 21s
public.ecr.aws/amazonlinux/amazonlinux:2023	2m 13s
	1h 15m 13s

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