[clang] [Clang] Diagnose nested inline asm variants (PR #232686)

[Shray Jaiswal via cfe-commits]

shrayjaiswal050-design wrote:

I have read the LLVM AI Tool Use Policy, Code-Review Policy and Practices, and Developer Policy. AI assistance from OmniRush.ai was used for this PR and is disclosed in the description. I reviewed the patch and ran the listed tests.

https://github.com/llvm/llvm-project/pull/232686