[clang] [clang] Bind the __builtin_bit_cast operand as std::bit_cast binds its parameter (PR #231830)

[Eli Friedman via cfe-commits]

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@@ -428,7 +428,7 @@ struct vol_mem {
 };
 
 // both-error at +2 {{constexpr variable 'run_vol_mem' must be initialized by a constant expression}}
-// both-note at +1 {{non-literal type 'vol_mem' cannot be used in a constant expression}}
+// both-note-re at +1 {{non-literal type '{{(const )?}}vol_mem' cannot be used in a constant expression}}
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efriedma-quic wrote:

Please fix bytecode at the same time.

https://github.com/llvm/llvm-project/pull/231830