[clang] [Clang][Sema] Diagnose friend declarations with enum elaborated-type-specifier in all language modes (PR #80171)

[Krystian Stasiowski via cfe-commits]

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@@ -380,7 +375,8 @@ class DeclSpec {
   unsigned FS_noreturn_specified : 1;
 
   // friend-specifier
-  unsigned Friend_specified : 1;
+  unsigned FriendSpecified : 1;
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sdkrystian wrote:

`LLVM_PREFERRED_TYPE` I believe

https://github.com/llvm/llvm-project/pull/80171