[EXP][Command-Buffer] Fix CUDA Coverity issues

Address issues in the CUDA adapter code added by oneapi-src#1089
flagged by Coverity.

* Uninitalized struct member of `CUDA_KERNEL_NODE_PARAMS` struct
* copying instead of moving a shared pointer to a node when
  constructing a command-handle.

Author: EwanC

source/adapters/cuda/command_buffer.cpp

@@ -72,11 +72,12 @@ ur_exp_command_buffer_handle_t_::~ur_exp_command_buffer_handle_t_() {
 ur_exp_command_buffer_command_handle_t_::
     ur_exp_command_buffer_command_handle_t_(
         ur_exp_command_buffer_handle_t CommandBuffer, ur_kernel_handle_t Kernel,
-        std::shared_ptr<CUgraphNode> Node, CUDA_KERNEL_NODE_PARAMS Params,
+        std::shared_ptr<CUgraphNode> &&Node, CUDA_KERNEL_NODE_PARAMS Params,
         uint32_t WorkDim, const size_t *GlobalWorkOffsetPtr,
         const size_t *GlobalWorkSizePtr, const size_t *LocalWorkSizePtr)
-    : CommandBuffer(CommandBuffer), Kernel(Kernel), Node(Node), Params(Params),
-      WorkDim(WorkDim), RefCountInternal(1), RefCountExternal(1) {
+    : CommandBuffer(CommandBuffer), Kernel(Kernel), Node{std::move(Node)},
+      Params(Params), WorkDim(WorkDim), RefCountInternal(1),
+      RefCountExternal(1) {
   CommandBuffer->incrementInternalReferenceCount();
 
   const size_t CopySize = sizeof(size_t) * WorkDim;
@@ -375,6 +376,7 @@ UR_APIEXPORT ur_result_t UR_APICALL urCommandBufferAppendKernelLaunchExp(
     NodeParams.blockDimZ = ThreadsPerBlock[2];
     NodeParams.sharedMemBytes = LocalSize;
     NodeParams.kernelParams = const_cast<void **>(ArgIndices.data());
+    NodeParams.kern = nullptr;
     NodeParams.extra = nullptr;
 
     // Create and add an new kernel node to the Cuda graph
@@ -392,8 +394,8 @@ UR_APIEXPORT ur_result_t UR_APICALL urCommandBufferAppendKernelLaunchExp(
     }
 
     auto NewCommand = new ur_exp_command_buffer_command_handle_t_{
-        hCommandBuffer, hKernel,           NodeSP,          NodeParams,
-        workDim,        pGlobalWorkOffset, pGlobalWorkSize, pLocalWorkSize};
+        hCommandBuffer, hKernel,           std::move(NodeSP), NodeParams,
+        workDim,        pGlobalWorkOffset, pGlobalWorkSize,   pLocalWorkSize};
 
     NewCommand->incrementInternalReferenceCount();
     hCommandBuffer->CommandHandles.push_back(NewCommand);

source/adapters/cuda/command_buffer.hpp

@@ -183,7 +183,7 @@ static inline const char *getUrResultString(ur_result_t Result) {
 struct ur_exp_command_buffer_command_handle_t_ {
   ur_exp_command_buffer_command_handle_t_(
       ur_exp_command_buffer_handle_t CommandBuffer, ur_kernel_handle_t Kernel,
-      std::shared_ptr<CUgraphNode> Node, CUDA_KERNEL_NODE_PARAMS Params,
+      std::shared_ptr<CUgraphNode> &&Node, CUDA_KERNEL_NODE_PARAMS Params,
       uint32_t WorkDim, const size_t *GlobalWorkOffsetPtr,
       const size_t *GlobalWorkSizePtr, const size_t *LocalWorkSizePtr);