Windows failure in `TestCommandTests.swift`

### Is it reproducible with SwiftPM command-line tools: `swift build`, `swift test`, `swift package` etc? - [x] Confirmed reproduction steps with SwiftPM CLI. The description text _must_ include reproduction steps with either of command-line SwiftPM commands, `swift build`, `swift test`, `swift package` etc. ### Description In #9962, I experimentally tried removing `withKnownIssue(isIntermittent: true)` from one of the tests in `TestCommandTests.swift`. It failed on Windows, perhaps due to long file names. I'm filing this issue so I can tag the test with this. <details><summary>Windows CI failure log</summary> <p> ``` [2026-04-22T18:26:32.112Z] × Test swiftTestParallelXunitOutputCombinedEqualsForm(buildSystem:) recorded an issue with 1 argument buildSystem → .swiftbuild at TestCommandTests.swift:545:6: Caught error: terminated(1): C:\source\swiftpm\.test\out\Products\Debug-windows\swift-test --package-path C:\Users\ContainerAdministrator\AppData\Local\Temp\DefaultInteropMode.BnYmom\DefaultInteropMode --configuration debug --build-system swiftbuild --parallel --enable-xctest --enable-swift-testing --xunit-output=C:\Users\ContainerAdministrator\AppData\Local\Temp\DefaultInteropMode.BnYmom\DefaultInteropMode\output.xml output: [2026-04-22T18:26:32.112Z] Building for debugging... [2026-04-22T18:26:32.112Z] Computing dependencies [2026-04-22T18:26:32.112Z] Constructing description [2026-04-22T18:26:32.112Z] Pre-planning 1 / 66 [2026-04-22T18:26:32.112Z] Planning 1 / 66 [2026-04-22T18:26:32.112Z] Planning deferred tasks [2026-04-22T18:26:32.112Z] Creating build graph [2026-04-22T18:26:32.112Z] Constructing 1 / 137 [2026-04-22T18:26:32.112Z] [33/100] DefaultInteropModeTests-test-runner 11 / 32 [2026-04-22T18:26:32.112Z] [60/100] DefaultInteropModeTests-product 20 / 33 [2026-04-22T18:26:32.112Z] [58/100] DefaultInteropModeTests-product 20 / 34 [2026-04-22T18:26:32.112Z] [62/100] DefaultInteropModeTests-product 23 / 36 [2026-04-22T18:26:32.112Z] [72/100] DefaultInteropModeTests-product 27 / 36 [2026-04-22T18:26:32.112Z] [72/100] DefaultInteropModeTests-product 27 / 37 [2026-04-22T18:26:32.112Z] [75/100] DefaultInteropModeTests-product 28 / 37 [2026-04-22T18:26:32.112Z] [81/100] DefaultInteropModeTests-product 30 / 37 [2026-04-22T18:26:32.112Z] [83/100] DefaultInteropModeTests-test-runner 31 / 37 [2026-04-22T18:26:32.112Z] [84/100] DefaultInteropModeTests-test-runner 32 / 38 [2026-04-22T18:26:32.112Z] [82/100] DefaultInteropModeTests-test-runner 32 / 39 [2026-04-22T18:26:32.112Z] [84/100] DefaultInteropModeTests-test-runner 34 / 40 [2026-04-22T18:26:32.112Z] [93/100] DefaultInteropModeTests-test-runner 39 / 41 [2026-04-22T18:26:32.112Z] error: FileSystemError(kind: TSCBasic.FileSystemError.Kind.noEntry, path: Optional(<AbsolutePath:"C:\Users\ContainerAdministrator\AppData\Local\Temp\DefaultInteropMode.BnYmom\DefaultInteropMode\.build\out\Intermediates.noindex\DefaultInteropMode.build\Debug-windows\DefaultInteropModeTests-test-runner.build\Objects-normal\x86_64\DefaultInteropModeTests-test-runner.LinkFileList">)) [2026-04-22T18:26:32.112Z] error: Ld C:\\Users\\ContainerAdministrator\\AppData\\Local\\Temp\\DefaultInteropMode.BnYmom\\DefaultInteropMode\\.build\\out\\Products\\Debug-windows\\DefaultInteropModeTests-test-runner.exe normal failed with a nonzero exit code. Command line: cd C:\Users\ContainerAdministrator\AppData\Local\Temp\DefaultInteropMode.BnYmom\DefaultInteropMode [2026-04-22T18:26:32.112Z] C:\Users\ContainerAdministrator\AppData\Local\Programs\Swift\Toolchains\6.2.0+Asserts\usr\bin\swiftc.exe -target x86_64-unknown-windows-msvc -emit-executable -sdk C:\Users\ContainerAdministrator\AppData\Local\Programs\Swift\Platforms\6.2.0\Windows.platform\Developer\SDKs\Windows.sdk -LC:\Users\ContainerAdministrator\AppData\Local\Temp\DefaultInteropMode.BnYmom\DefaultInteropMode\.build\out\Intermediates.noindex\EagerLinkingTBDs\Debug-windows -LC:\Users\ContainerAdministrator\AppData\Local\Temp\DefaultInteropMode.BnYmom\DefaultInteropMode\.build\out\Products\Debug-windows -LC:\Users\ContainerAdministrator\AppData\Local\Programs\Swift\Platforms\6.2.0\Windows.platform\Developer\SDKs\Windows.sdk\usr\lib\swift\windows\x86_64 -LC:\Users\ContainerAdministrator\AppData\Local\Programs\Swift\Platforms\6.2.0\Windows.platform\Developer\Library\Testing-6.2.0\usr\lib\swift\windows -LC:\Users\ContainerAdministrator\AppData\Local\Programs\Swift\Platforms\6.2.0\Windows.platform\Developer\Library\Testing-6.2.0\usr\lib\swift\windows\x86_64 -LC:\Users\ContainerAdministrator\AppData\Local\Programs\Swift\Platforms\6.2.0\Windows.platform\Developer\Library\XCTest-6.2.0\usr\lib\swift\windows\x86_64 -LC:\Users\ContainerAdministrator\AppData\Local\Programs\Swift\Platforms\6.2.0\Windows.platform\Developer\Library\XCTest-6.2.0\usr\lib\swift\windows @C:\Users\ContainerAdministrator\AppData\Local\Temp\DefaultInteropMode.BnYmom\DefaultInteropMode\.build\out\Intermediates.noindex\DefaultInteropMode.build\Debug-windows\DefaultInteropModeTests-test-runner.build\Objects-normal\x86_64\DefaultInteropModeTests-test-runner.LinkFileList -Xlinker /OPT:REF -LC:\Users\ContainerAdministrator\AppData\Local\Programs\Swift\Toolchains\6.2.0+Asserts\usr\lib\swift -L/usr/lib/swift -use-ld=lld-link -Xlinker -debug:dwarf -lDefaultInteropModeTests -o C:\Users\ContainerAdministrator\AppData\Local\Temp\DefaultInteropMode.BnYmom\DefaultInteropMode\.build\out\Products\Debug-windows\DefaultInteropModeTests-test-runner.exe [2026-04-22T18:26:32.112Z] error: Build failed [2026-04-22T18:26:32.112Z] error: fatalError [2026-04-22T18:26:32.112Z] [2026-04-22T18:26:32.112Z] × Test swiftTestParallelXunitOutputCombinedEqualsForm(buildSystem:) with 2 test cases failed after 92.687 seconds with 1 issue. ``` </p> </details> ### Expected behavior _No response_ ### Actual behavior _No response_ ### Steps to reproduce _No response_ ### Swift Package Manager version/commit hash _No response_ ### Swift & OS version (output of `swift --version ; uname -a`) _No response_