[clang] [clang] Don't emit the warn_dangling_lifetime_pointer diagnostic for the assignment case. (PR #97408)

[Utkarsh Saxena via cfe-commits]

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+// RUN: %clang_cc1 -std=c++20 -verify -Wno-dangling-assignment %s
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usx95 wrote:

I would suggest dropping `-Wno-dangling-assignment` and ensuring that we get "only" the dangling assignment and not GSL ones.
This would also not need a new file.

https://github.com/llvm/llvm-project/pull/97408