fs: fix rmSync to handle non-ASCII characters

Update fs.rmSync to properly handle file paths that include
non-ASCII characters. This change prevents crashes and errors
when attempting to delete files with international or special
characters in their names.

Add a test in test/parallel to ensure that files with non-ASCII
characters can be deleted without issues. This covers cases
that previously caused unexpected behavior or crashes on
certain file systems.

Fixes: #56049

Author: Yeaseen

src/node_file.cc

@@ -1625,7 +1625,7 @@ static void RmSync(const FunctionCallbackInfo<Value>& args) {
   ToNamespacedPath(env, &path);
   THROW_IF_INSUFFICIENT_PERMISSIONS(
       env, permission::PermissionScope::kFileSystemWrite, path.ToStringView());
-  auto file_path = std::filesystem::path(path.ToStringView());
+  auto file_path = std::filesystem::path(path.ToU8StringView());
   std::error_code error;
   auto file_status = std::filesystem::status(file_path, error);
 

test/parallel/test-fs-rmSync-special-char.js

@@ -0,0 +1,33 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const assert = require('assert');
+
+// Specify the path for the test file
+const filePath = path.join(__dirname, '速.txt');
+
+// Create a file with the specified name
+fs.writeFileSync(filePath, 'This is a test file containing special characters in the name.');
+
+// Function to try removing the file and verify the outcome
+function testRemoveFile() {
+  try {
+    // Attempt to remove the file
+    fs.rmSync(filePath);
+    
+    // Check if the file still exists to confirm it was removed
+    assert.ok(!fs.existsSync(filePath), 'The file should be removed.');
+
+    console.log('File removed successfully.');
+  } catch (error) {
+    // Output an error if the removal fails
+    console.error('Failed to remove file:', error);
+    
+    // Explicitly fail the test if an error is thrown
+    assert.fail('File removal should not throw an error.');
+  }
+}
+
+// Run the test function
+testRemoveFile();