[clang] [clang][Sema] Fix crash on nested CTAD with InjectedClassNameType (#1… (PR #207644)

[Younan Zhang via cfe-commits]

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zyn0217 wrote:

This test should either be wrapped with a namespace of `GH...` form or be renamed to its issue number `GHyyyyy.cpp`, also, this comment should be removed because it explains nothing useful.

Plus, this writing style of test suggests some AI agents are likely involved and per our contribution document you're required to disclose that in the PR, thanks.

https://github.com/llvm/llvm-project/pull/207644