[clang] [clang][Sema] Fix for enums overflowing (#24667) (PR #78742)

[Aaron Ballman via cfe-commits]

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@@ -135,6 +135,12 @@ C23 Feature Support
   ``__TYPE_FMTb__`` (e.g., ``__UINT_FAST64_FMTB__``) in C23 mode for use with
   macros typically exposed from ``<inttypes.h>``, such as ``PRIb8``.
   (`#81896: <https://github.com/llvm/llvm-project/issues/81896>`_).
+- Enumerations should allow values greater than INT_MAX and smaller than
+  INT_MIN, in order to provide a value-preserved set of integer constants. `N3029 Improved Normal Enumerations <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3029.htm>`_
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AaronBallman wrote:

```suggestion
- Enumerations should allow values greater than ``INT_MAX`` and smaller than
  ``INT_MIN``, in order to provide a value-preserved set of integer constants. `N3029 Improved Normal Enumerations <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3029.htm>`_
```

https://github.com/llvm/llvm-project/pull/78742