[clang] [Clang][AST] Track whether template template parameters used the 'typename' keyword (PR #88139)

[Krystian Stasiowski via cfe-commits]

sdkrystian wrote:

Seems like there is a stray call to `TemplateTemplateParmDecl::Create` in LLDB... #88139 will address it


https://github.com/llvm/llvm-project/pull/88139