[clang] [CIR]/[OGCG] Fix handling of bool-backed-scoped-enums (PR #214084)

[Aaron Ballman via cfe-commits]

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@@ -47,3 +47,21 @@ E b(int x) { return (E)x; }
 
 } // namespace D
 } // namespace dr2338
+
+namespace switchOnEnum {
+enum class E : bool { Zero, One };
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AaronBallman wrote:

Can you add a `_BitInt` test as well to show we fix that issue too?

https://github.com/llvm/llvm-project/pull/214084