sort: deduplicate SI unit constants to shared uucore module #903

Job	Run time
L10n/Clap Error Localization Test	1m 58s
L10n/French Integration Test	2m 16s
L10n/Locale Support Verification	7m 29s
L10n/Fluent Syntax Check	18s
L10n/Build and Test (ubuntu-latest, feat_os_unix)	3m 54s
L10n/Multi-call Binary Install Test (macos-latest, feat_os_macos)	4m 18s
L10n/Installation Test (Make & Cargo) (ubuntu-latest, feat_os_unix)	8m 25s
L10n/Build and Test (windows-latest, feat_os_windows)	8m 53s
L10n/Multi-call Binary Install Test (ubuntu-latest, feat_os_unix)	3m 38s
L10n/Build and Test (macos-latest, feat_os_macos)	5m 28s
L10n/Locale Embedding - Cat Utility	1m 29s
L10n/Installation Test (Make & Cargo) (macos-latest, feat_os_macos)	7m 56s
L10n/Locale Embedding - Cargo Install	1m 4s
L10n/Locale Embedding - Multicall Binary	2m 59s
L10n/Embedded Locale Regression Test	2m 7s
L10n/Locale Embedding - Ls Utility	1m 7s
L10n/Locale Embedding Regression Test	3s
	1h 3m 22s

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