[clang] Fix enum enumerator visibility loss when #include is between module imports (PR #188865)

[Chuanqi Xu via cfe-commits]

ChuanqiXu9 wrote:

> I could feed your feedback to the AI, but then I just become a conduit between you. I don't mind doing that but I don't think it's effective. I just don't have sufficient understanding of the codebase.

@avikivity this depends on what you want to do,

if you just want to provide a issue report and some hints to compiler developers, I think you've done a great job. It indeed helped me to understand the problem sooner.

But if you want to contribute the project directly, according to our AI policy (https://llvm.org/docs/AIToolPolicy.html), you have to understand what you send. 

https://github.com/llvm/llvm-project/pull/188865