[clang] [LifetimeSafety] Add fix-it for misplaced lifetimebound attributes (PR #199149)

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NeKon69 wrote:

> Not something that needs to be addressed in this PR, but another thing I’m a bit unsure about is whether we should move these warnings to `LifetimeSafetySuggestions` group now that they have fix-its. My concern is that this would also cause these warnings to show up in `warn-lifetime-safety-fixits.cpp` and `warn-lifetime-safety-suggestions.cpp`, which probably wouldn’t be ideal.

@usx95 What would you say about that?

https://github.com/llvm/llvm-project/pull/199149