[clang] [Clang] Improve error recovery for invalid calls (PR #136295)

[via cfe-commits]

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@@ -2218,27 +2218,20 @@ Parser::ParsePostfixExpressionSuffix(ExprResult LHS) {
         CalledSignatureHelp = true;
         return PreferredType;
       };
+      bool KnownInvalidCall = false;
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cor3ntin wrote:

```suggestion
      bool ExpressionListIsInvalid = false;
```

(Might not be a call)

https://github.com/llvm/llvm-project/pull/136295