Remove redundant AsyncTask logging from LinkNativeRuntime

[Copilot]

LinkNativeRuntime was logging a second failure message via the obsolete AsyncTask.Log property after native linking failed. NativeLinker already reports those failures through localized coded errors (XA3007/XA3008), so the extra log path was both unsafe and redundant.

• LinkNativeRuntime cleanup

  • Remove the direct Log.LogError (...) call from LinkRuntime.
  • Drop the now-unused success local and invoke NativeLinker.Link (...) directly.

• Error reporting behavior

  • Keep link failure diagnostics flowing through the existing NativeLinker error paths.
  • Preserve the existing localized/coded errors instead of emitting a raw inline message from a background-thread task.

• Resulting code shape

  List<ITaskItem> items = OrganizeCommandLineItemsCLR (abi);
  linker.Link (
  	outputRuntime,
  	items,
  	GetAbiItems (NativeLinkStartFiles, "_NativeLinkStartFiles", abi),
  	GetAbiItems (NativeLinkEndFiles, "_NativeLinkEndFiles", abi),
  	GetAbiItems (NativeSymbolsToExport, "_NativeSymbolsToExport", abi)
  );

• Fixes [fix-finder] Replace obsolete Log.LogError with thread-safe logging in LinkNativeRuntime task #12237

[Copilot]

Pull request overview

Removes redundant and unsafe error logging from the LinkNativeRuntime MSBuild task by relying on NativeLinker’s existing coded/localized error reporting for native link failures.

Changes:

• Drop the bool success local and invoke NativeLinker.Link(...) directly.
• Remove the extra Log.LogError(...) path that emitted a non-localized message from an AsyncTask background thread.
• Preserve existing XA3007/XA3008 failure diagnostics emitted by NativeLinker.