[clang] [Clang] Fix crash when type-name is combined with class specifier in template argument (PR #191689)

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TPPPP72 wrote:

@ojhunt I believe there are actually two issues: `VisitTagTypeLoc` and `VisitTypedefTypeLoc`. I've currently implemented checks for `VisitTagTypeLoc`, but the test case using `using T = int` still results in a crash.

https://github.com/llvm/llvm-project/pull/191689