Don't cache getlimits #17955

Job	Run time
Style/Python	7s
Style/toml	12s
Style/spelling (ubuntu-latest, feat_os_unix)	15s
Style/format (ubuntu-latest, feat_os_unix)	34s
Pre-commit hooks	40s
Style/lint (windows-latest, feat_os_windows)	3m 20s
Style/lint (ubuntu-latest, all, true)	3m 28s
Style/lint (macos-latest, feat_os_macos)	3m 21s
	11m 57s

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