[clang] [Clang] Fix assertion "unsigned range includes negative?" in AnalyzeComparison during Sema of vector comparison with mismatched signed/unsigned types and __builtin_convertvector (PR #182627)

[Yutong Zhu via cfe-commits]

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@@ -11479,6 +11223,12 @@ static QualType GetExprType(const Expr *E) {
   return Ty;
 }
 
+static bool isUnsignedIntegerOrVectorElementType(QualType T) {
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YutongZhuu wrote:

Good idea!

https://github.com/llvm/llvm-project/pull/182627