[clang] [LifetimeSafety] Add better lifetimebound fix-it spelling for C (PR #209967)

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+// RUN: %clang_cc1 -fsyntax-only -std=c17 -fexperimental-lifetime-safety-c \
+// RUN:   -flifetime-safety-inference -fexperimental-lifetime-safety-tu-analysis \
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NeKon69 wrote:

I don't think we need these 2 arguments for this test anywhere?

https://github.com/llvm/llvm-project/pull/209967