Regression when file already exists when exploding archive

[jonesbusy]

Last security fix cause a regression when exploding archive. Previous any existing files where replaced, which is not the case now.

Fix it and add a test to prevent future regression

This cause issue on Jenkins (for example getting library artifacty)

26-05-28T05:14:24.330Z] 	at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:94)
[2026-05-28T05:14:24.330Z] 	at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)
[2026-05-28T05:14:24.330Z] 	at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
[2026-05-28T05:14:24.330Z] 	at java.base/sun.nio.fs.UnixFileSystemProvider.newFileChannel(UnixFileSystemProvider.java:213)
[2026-05-28T05:14:24.330Z] 	at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:244)
[2026-05-28T05:14:24.330Z] 	at java.base/java.nio.file.spi.FileSystemProvider.newOutputStream(FileSystemProvider.java:426)
[2026-05-28T05:14:24.330Z] 	at java.base/java.nio.file.Files.newOutputStream(Files.java:215)
[2026-05-28T05:14:24.330Z] 	at PluginClassLoader for oras-java-api//land.oras.utils.ArchiveUtils.untar(ArchiveUtils.java:459)
[2026-05-28T05:14:24.330Z] Caused: land.oras.exception.OrasException: Failed to extract tar.gz file
[2026-05-28T05:14:24.330Z] 	at PluginClassLoader for oras-java-api//land.oras.utils.ArchiveUtils.untar(ArchiveUtils.java:474)
[2026-05-28T05:14:24.330Z] 	at PluginClassLoader for oras-java-api//land.oras.Registry.pullLayer(Registry.java:1109)
[2026-05-28T05:14:24.330Z] 	at PluginClassLoader for oras-java-api//land.oras.Registry.lambda$pullArtifact$4(Registry.java:550)
[2026-05-28T05:14:24.330Z] 	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1825)
[2026-05-28T05:14:24.330Z] Caused: java.util.concurrent.CompletionException

Description

Testing done

Submitter checklist

• I have read and understood the CONTRIBUTING guide
• I have run mvn license:update-file-header, mvn spotless:apply, pre-commit run -a, mvn clean install before opening the PR

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.15%. Comparing base (083fe12) to head (c6f3ad3).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #720      +/-   ##
============================================
+ Coverage     87.05%   87.15%   +0.09%     
+ Complexity      975      968       -7     
============================================
  Files            45       45              
  Lines          3036     3036              
  Branches        381      381              
============================================
+ Hits           2643     2646       +3     
+ Misses          232      231       -1     
+ Partials        161      159       -2     

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