shuf: Tune performance for -i 1-1000000 #17945

Job	Run time
Style/toml	11s
Pre-commit hooks	1m 13s
Style/Python	6s
Style/format (ubuntu-latest, feat_os_unix)	25s
Style/lint (ubuntu-latest, all, true)	3m 17s
Style/lint (macos-latest, feat_os_macos)	3m 47s
Style/spelling (ubuntu-latest, feat_os_unix)	14s
Style/lint (windows-latest, feat_os_windows)	5m 54s
	15m 7s

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