[clang] [C++20] [Modules] Do not generate call to module initialization for const init (PR #218346)

[Chuanqi Xu via cfe-commits]

ChuanqiXu9 wrote:

> In the new test, for the cases using `thread_local`, in Darwin build `%itanium_abi_triple` will default to `arm64-apple-darwin-unknown`, which results in failure due to clang error:
> 
> ```
> # | NoInit.cpp:7:1: error: thread-local storage is not supported for the current target
> [CONTEXT] # |     7 | thread_local int tls = f();
> [CONTEXT] # |       | ^
> ```

Thanks for pointing this out. I'll try to fix it soon.

https://github.com/llvm/llvm-project/pull/218346