[clang] [clang][Sema] Move computing enum width and type to a separate function (PR #120965)

[via cfe-commits]

================
@@ -5209,6 +5209,85 @@ QualType ASTContext::getEnumType(const EnumDecl *Decl) const {
   return QualType(newType, 0);
 }
 
+bool ASTContext::computeBestEnumTypes(bool isPacked, unsigned NumNegativeBits,
----------------
Sirraide wrote:

```suggestion
bool ASTContext::computeBestEnumTypes(bool IsPacked, unsigned NumNegativeBits,
```

https://github.com/llvm/llvm-project/pull/120965