[clang-tools-extra] [clang-include-cleaner] Fix -Wpessimizing-move warning introduced in 4cda28c1ada702a08f6960eb4c93919187c1d4d1 (PR #112684)

[Mikael Holmén via cfe-commits]

mikaelholmen wrote:

Already fixed in 2954d1f7bc8f
```
    [include-cleaner] Fix -Wpessimizing-move in IncludeCleaner.cpp (NFC)
    
    /llvm-project/clang-tools-extra/include-cleaner/tool/IncludeCleaner.cpp:302:14:
    error: moving a temporary object prevents copy elision [-Werror,-Wpessimizing-move]
          return std::move(llvm::errorCodeToError(Err));
                 ^
    /llvm-project/clang-tools-extra/include-cleaner/tool/IncludeCleaner.cpp:302:14: note: remove std::move call here
          return std::move(llvm::errorCodeToError(Err));
                 ^~~~~~~~~~                           ~
    1 error generated.
```

https://github.com/llvm/llvm-project/pull/112684