[clang] [Clang] Fix spurious "satisfaction of constraint ... depends on itself" from nested synthesized comparisons (PR #223289)

[Younan Zhang via cfe-commits]

https://github.com/zyn0217 requested changes to this pull request.

You could have talked to me before you ask your AI to work on this issue.

That said, the fix is wrong, we cannot find any other instantiations outside of the scope either, since they can be also instantiated with different template arguments like what ParmVarDecl had suffered.


https://github.com/llvm/llvm-project/pull/223289