[clang] CTAD: Track template template type parameters that referenced in the template arguments of the RHS. (#85405) Fixes https://github.com/llvm/llvm-project/issues/85385. The Finder was missing for this case, for the crash test, the template parameter TTP was incorrectly considered as not referenced/appeared in the template arguments of the right hand side of the alias template decl, thus the synthesized deduction decl doesn't contain this TTP in the template parameter list, but we have references in the declaration, thus it caused crashes.
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