Revert "[Stablehlo] fix template typo (#3842)"

This reverts commit 3dbeda9.

Author: rahuls-cerebras

lib/Conversion/TorchToStablehlo/Basic.cpp

@@ -941,7 +941,7 @@ class ConvertAtenPowOp : public OpConversionPattern<AtenOpT> {
   matchAndRewrite(AtenOpT op, OpAdaptor adaptor,
                   ConversionPatternRewriter &rewriter) const override {
     auto outType = cast<TensorType>(
-        OpConversionPattern<AtenOpT>::getTypeConverter()->convertType(
+        OpConversionPattern<AtenPowScalarOp>::getTypeConverter()->convertType(
             op.getType()));
 
     Type outElemTy = outType.getElementType();