cksum: Move --check confliction to clap #6383

Job	Run time
L10n/Clap Error Localization Test	1m 44s
L10n/Installation Test (Make & Cargo) (macos-latest, feat_os_macos)	10m 11s
L10n/Locale Support Verification	6m 54s
L10n/Installation Test (Make & Cargo) (ubuntu-latest, feat_os_unix)	7m 11s
L10n/Build and Test (ubuntu-latest, feat_os_unix)	4m 25s
L10n/Locale Embedding - Multicall Binary	2m 49s
L10n/Locale Embedding - Cargo Install	1m 3s
L10n/Build and Test (macos-latest, feat_os_macos)	5m 16s
L10n/Fluent Syntax Check	14s
L10n/Locale Embedding - Ls Utility	1m 13s
L10n/Multi-call Binary Install Test (macos-latest, feat_os_macos)	4m 28s
L10n/French Integration Test	1m 43s
L10n/Locale Embedding - Cat Utility	44s
L10n/Build and Test (windows-latest, feat_os_windows)	8m 34s
L10n/Multi-call Binary Install Test (ubuntu-latest, feat_os_unix)	4m 8s
L10n/Embedded Locale Regression Test	1m 23s
L10n/Locale Embedding Regression Test	4s
	1h 2m 4s

Provide feedback