Add new pipline version to output stream operator.

include/ck/tensor_operation/gpu/grid/gridwise_gemm_pipeline_selector.hpp

 // SPDX-License-Identifier: MIT
-// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+// Copyright (c) 2018-2024, Advanced Micro Devices, Inc. All rights reserved.
 
 #pragma once
 
@@ -65,6 +65,7 @@ inline std::ostream& operator<<(std::ostream& os, const ck::PipelineVersion& p)
     case ck::PipelineVersion::v1: os << "PipelineVersion::v1"; break;
     case ck::PipelineVersion::v2: os << "PipelineVersion::v2"; break;
     case ck::PipelineVersion::v4: os << "PipelineVersion::v4"; break;
+    case ck::PipelineVersion::weight_only: os << "PipelineVersion::weight_only"; break;
     default: os << "";
     }
     return os;