Silence match and rewrite failures for the reshape memdesc pattern.
Previously, failure to match due to type inference failure would log to
stderr, which is unexpected for a match failure.

This is caused by the `verify_nvmma_encoding` patch, and can therefore only be
upstreamed with that patch. See context in b/504826033.

--- a/lib/Dialect/TritonGPU/Transforms/OptimizeDotOperands.cpp
+++ b/lib/Dialect/TritonGPU/Transforms/OptimizeDotOperands.cpp
@@ -161,7 +161,7 @@ public:
     // `allocType` after a reshape.
     MemDescType innerTy;
     if (failed(MemDescReshapeOp::inferReturnTypes(
-            getContext(), allocOp.getLoc(), allocType, srcShape, innerTy)))
+            getContext(), /*loc=*/std::nullopt, allocType, srcShape, innerTy)))
       return failure();
 
     // For now don't apply the transformation if the new encoding is not an