[clang] [C23] Handle type compatibility for enumerations better (PR #150282)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-hip-vega20` running on `hip-vega20-0` while building `clang` at step 2 "update-annotated-scripts".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/123/builds/24281

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 2 (update-annotated-scripts) failure: update (failure)
git version 2.34.1
fatal: unable to access 'https://github.com/llvm/llvm-zorg.git/': Could not resolve host: github.com
fatal: unable to access 'https://github.com/llvm/llvm-zorg.git/': Could not resolve host: github.com

```

</details>

https://github.com/llvm/llvm-project/pull/150282