[clang] [CIR] Simplify error emission to return failures directly (PR #141032)

[Henrich Lauko via cfe-commits]

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@@ -13,6 +13,7 @@
 #include "clang/CIR/Dialect/IR/CIRTypes.h"
 
 #include "mlir/IR/DialectImplementation.h"
+#include "mlir/Support/LLVM.h"
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xlauko wrote:

Good catch, I missed that it was added by my IDE, it is unnecessary, I will remove it.

https://github.com/llvm/llvm-project/pull/141032