[clang] [Clang][Sema] access checking of friend declaration should not be delayed (PR #91430)

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@@ -1477,8 +1477,16 @@ static Sema::AccessResult CheckAccess(Sema &S, SourceLocation Loc,
   //   void foo(A::private_type);
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cor3ntin wrote:

The comment above needs tweaking

https://github.com/llvm/llvm-project/pull/91430