[clang] [Clang][Sema] Disable checking invalid template id in initializer of primary variable template `std::format_kind` with libstdc++ (PR #139560)

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cor3ntin wrote:

> @cor3ntin I don't have commit access. Please help me land this.
> 
> By the way, should I request commit access?

It might be a good idea ! https://llvm.org/docs/DeveloperPolicy.html#obtaining-commit-access

https://github.com/llvm/llvm-project/pull/139560