[clang] [-Wunsafe-buffer-usage] Fix false positives for string literals (PR #115554)

[Malavika Samak via cfe-commits]

malavikasamak wrote:

I think we can close this PR, since we already merged this as part of https://github.com/llvm/llvm-project/pull/115552

https://github.com/llvm/llvm-project/pull/115554