fix: correct concatenate_files operation config in rust_wasm_component_bindgen

The concatenate_files operation config was using 'input_files' and 'output_file'
but the file_ops implementation expects 'src_paths' and 'dest_path'. This was
causing the "concatenate_files operation missing src_paths" error in CI.

Fixed field names to match the file_ops schema:
- input_files → src_paths (list of source file paths)
- output_file → dest_path (destination file path)

This fixes the Rust component wrapper generation in guest mode.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: avrabe

rust/rust_wasm_component_bindgen.bzl

@@ -325,8 +325,8 @@ with open(sys.argv[3], 'w') as f:
                 "workspace_dir": ".",
                 "operations": [{
                     "type": "concatenate_files",
-                    "input_files": [temp_wrapper.path, ctx.file.bindgen.path],
-                    "output_file": out_file.path,
+                    "src_paths": [temp_wrapper.path, ctx.file.bindgen.path],
+                    "dest_path": out_file.path,
                 }],
             }),
         )