[clang] [analyzer] Fix a crash from element region construction during `ArrayInitLoopExpr` analysis (PR #113570)

[Balazs Benics via cfe-commits]

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@@ -330,3 +330,41 @@ void no_crash() {
 }
 
 } // namespace crash
+
+namespace array_subscript_initializer {
+struct S {
+  int x;
+};
+
+void no_crash() {
+  S arr[][2] = {{1, 2}};
+
+  const auto [a, b] = arr[0]; // no-crash
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steakhal wrote:

My bad. Im too tired now.

https://github.com/llvm/llvm-project/pull/113570