tests: GNU-compat coverage for write-errors and ls TIME_STYLE (#4627) #872

Job	Run time
L10n/Build and Test (windows-latest, feat_os_windows)	4m 25s
L10n/Fluent Syntax Check	19s
L10n/Embedded Locale Regression Test	1m 19s
L10n/Installation Test (Make & Cargo) (ubuntu-latest, feat_os_unix)	6m 3s
L10n/Installation Test (Make & Cargo) (macos-latest, feat_os_macos)	5m 35s
L10n/French Integration Test	57s
L10n/Build and Test (macos-latest, feat_os_macos)	2m 3s
L10n/Clap Error Localization Test	50s
L10n/Multi-call Binary Install Test (macos-latest, feat_os_macos)	4m 33s
L10n/Locale Support Verification	7m 41s
L10n/Locale Embedding Regression Test	2m 42s
L10n/Multi-call Binary Install Test (ubuntu-latest, feat_os_unix)	4m 8s
L10n/Build and Test (ubuntu-latest, feat_os_unix)	2m 26s
	43m 1s

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