[llvm] [llvm-profgen] Remove temporary perf script files (PR #86668)

[Haohai Wen via llvm-commits]

HaohaiWen wrote:

> Thx. This mechanism is similar to `"llvm/Support/ToolOutputFile.h"`

Thanks for letting me know. This make the code much cleaner. I filed a patch to make CleanupInstaller public so that it can be used here. https://github.com/llvm/llvm-project/pull/86758

https://github.com/llvm/llvm-project/pull/86668