[clang] [Clang][Sema] Fix issue on requires expression with templated base class member function (PR #85198)

[Qizhi Hu via cfe-commits]

================
@@ -7735,7 +7735,8 @@ ExprResult Sema::BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl,
   }
 
   if (CXXMethodDecl *Method = dyn_cast_or_null<CXXMethodDecl>(FDecl))
-    if (Method->isImplicitObjectMemberFunction())
+    if (!isa<RequiresExprBodyDecl>(CurContext) &&
----------------
jcsxky wrote:

@erichkeane I am still feeling that we have no need to check whether the method has a explicit object parameter in require clause. In type requirement, checking nested member is enough(name resolution and parameter checking has already completed) and we don't need object argument since it isn't a function call.
```cpp
struct S {
  void foo() {}
};
void bar() {
  S::foo(); // need object parameter
  foo();    // name resolution failed
```
It is only doing a function call that object parameter is required.

https://github.com/llvm/llvm-project/pull/85198