[clang] Suppress errors from well-formed-testing type traits in SFINAE contexts (PR #135390)

[Aaron Puchert via cfe-commits]

================
@@ -12240,16 +12240,16 @@ class Sema final : public SemaBase {
     bool PrevLastDiagnosticIgnored;
 
   public:
-    explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false)
+    explicit SFINAETrap(Sema &SemaRef, bool TestWellformedSFINAE = false)
----------------
aaronpuchert wrote:

Although later it does say "only the validity of the immediate context is considered." So I guess it's fine.

https://github.com/llvm/llvm-project/pull/135390