[clang] [clang] Fix implicit integer conversion for opaque enums declared in class templates (PR #121039)

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@@ -938,6 +938,9 @@ Miscellaneous Clang Crashes Fixed
 - Fixed internal assertion firing when a declaration in the implicit global
   module is found through ADL. (GH#109879)
 
+- Fixed a crash when an unscoped enumeration declared by an opaque-enum-declaration within a class template
+  with a dependent underlying type is subject to integral promotion. (GH#117960)
----------------
cor3ntin wrote:

```suggestion
  with a dependent underlying type is subject to integral promotion. (#GH117960)
```

https://github.com/llvm/llvm-project/pull/121039