[llvm] [llvm-reduce]: print short form, actionable names in the log (PR #133561)

[Matt Arsenault via llvm-commits]

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@@ -17,13 +17,15 @@
 
 #include "ReducerWorkItem.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringRef.h"
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arsenm wrote:

```suggestion
```

Don't think this is needed anymore 

https://github.com/llvm/llvm-project/pull/133561