[UR] Move stream_queue.hpp to common UR directory

Author: npmiller

.github/CODEOWNERS

@@ -75,6 +75,7 @@ llvm/include/llvm/SYCLLowerIR/SYCLCreateNVVMAnnotations.h @intel/llvm-reviewers-
 llvm/lib/SYCLLowerIR/SYCLCreateNVVMAnnotations.cpp @intel/llvm-reviewers-cuda
 llvm/lib/Target/NVPTX @intel/llvm-reviewers-cuda
 llvm/lib/Target/AMDGPU @intel/llvm-reviewers-cuda
+unified-runtime/source/common/cuda-hip @intel/llvm-reviewers-cuda
 
 # XPTI instrumentation utilities
 xpti/ @intel/llvm-reviewers-runtime

unified-runtime/source/adapters/cuda/queue.hpp

@@ -17,7 +17,7 @@
 #include <mutex>
 #include <vector>
 
-#include "stream_queue.hpp"
+#include <common/cuda-hip/stream_queue.hpp>
 
 /// UR queue mapping on to CUstream objects.
 ///

unified-runtime/source/adapters/hip/queue.hpp

@@ -14,7 +14,7 @@
 #include <mutex>
 #include <vector>
 
-#include "../cuda/stream_queue.hpp"
+#include <common/cuda-hip/stream_queue.hpp>
 
 /// UR queue mapping on to hipStream_t objects.
 ///

unified-runtime/source/adapters/cuda/stream_queue.hpp renamed to unified-runtime/source/common/cuda-hip/stream_queue.hpp

@@ -1,24 +1,26 @@
-//===--------- stream_queue.hpp - CUDA Adapter ----------------------------===//
-//
-// Copyright (C) 2025 Intel Corporation
-//
-// Part of the Unified-Runtime Project, under the Apache License v2.0 with LLVM
-// Exceptions. See LICENSE.TXT
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-#pragma once
+/*
+ *
+ * Copyright (C) 2025 Intel Corporation
+ *
+ * Part of the Unified-Runtime Project, under the Apache License v2.0 with LLVM
+ * Exceptions. See LICENSE.TXT
+ *
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ *
+ */
 
-#include <ur/ur.hpp>
+#pragma once
 
 #include <algorithm>
 #include <mutex>
 #include <vector>
 
 using ur_stream_guard = std::unique_lock<std::mutex>;
 
-/// Generic implementation of out-of-order queue using in-order streams.
+/// Generic implementation of an out-of-order UR queue based on in-order
+/// backend 'stream' objects.
 ///
+/// This class is specifically designed for the CUDA and HIP adapters.
 template <typename ST, int CS, int TS> struct stream_queue_t {
   using native_type = ST;
   static constexpr int DefaultNumComputeStreams = CS;