Fix CommandLineOptionIsReserved provider placeholder and align validator message assertions

[Copilot]

CommandLineOptionIsReserved in PlatformResources.resx used {0} for both placeholders, so reserved-option errors repeated the option name instead of showing offending provider names. This change wires the second placeholder correctly and aligns tests with the intended behavior.

• Resource string correction

  • Updated CommandLineOptionIsReserved from:
    • Option '--{0}' is reserved and cannot be used by providers: '{0}'
  • To:
    • Option '--{0}' is reserved and cannot be used by providers: '{1}'

• Localization artifact update

  • Regenerated affected PlatformResources.*.xlf files to keep localized resources in sync with the .resx source change.

• Command-line validator test updates

  • Updated CommandLineHandlerTests assertions to validate provider names in reserved-option failures.
  • For multi-provider cases, assertions now verify message content without assuming provider ordering.

stringBuilder.AppendLine(
    string.Format(
        CultureInfo.InvariantCulture,
        PlatformResources.CommandLineOptionIsReserved,
        kvp.Key,
        string.Join("', '", kvp.Value)));

[Copilot]

Pull request overview

Fixes a formatting issue in the CommandLineOptionIsReserved localized resource so reserved-option validation errors can display the offending provider name(s) (instead of repeating the option name), and updates unit tests accordingly.

Changes:

• Corrected CommandLineOptionIsReserved placeholder usage from {0}/{0} to {0}/{1}.
• Updated CommandLineHandlerTests assertions to validate provider names and avoid provider-order assumptions.
• Regenerated affected .xlf localization artifacts to reflect the updated source string.

Show a summary per file

File	Description
test/UnitTests/Microsoft.Testing.Platform.UnitTests/CommandLine/CommandLineHandlerTests.cs	Updates assertions to match the corrected reserved-option error message behavior.
src/Platform/Microsoft.Testing.Platform/Resources/PlatformResources.resx	Fixes the resource string placeholder so provider names are displayed correctly.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.zh-Hant.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.zh-Hans.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.tr.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.ru.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.pt-BR.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.pl.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.ko.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.ja.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.it.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.fr.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.es.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.de.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.
src/Platform/Microsoft.Testing.Platform/Resources/xlf/PlatformResources.cs.xlf	Syncs XLF CommandLineOptionIsReserved source/target with updated placeholder.

Copilot's findings

• Files reviewed: 15/15 changed files
• Comments generated: 13