[SYCLl][Graph] Make UR command-buffer desc mandatory

Bumps to UR tag to pull in UR change from oneapi-src/unified-runtime#2676
No DPC++ changes are required as `graph_impl.cpp` already unconditionally
passes a descriptor on UR command-buffer creation.

Author: EwanC

sycl/cmake/modules/FetchUnifiedRuntime.cmake

@@ -122,7 +122,7 @@ elseif(SYCL_UR_USE_FETCH_CONTENT)
       CACHE PATH "Path to external '${name}' adapter source dir" FORCE)
   endfunction()
 
-  set(UNIFIED_RUNTIME_REPO "https://github.com/oneapi-src/unified-runtime.git")
+  set(UNIFIED_RUNTIME_REPO "https://github.com/Bensuo/unified-runtime.git")
   include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/UnifiedRuntimeTag.cmake)
 
   set(UMF_BUILD_EXAMPLES OFF CACHE INTERNAL "EXAMPLES")

sycl/cmake/modules/UnifiedRuntimeTag.cmake

@@ -4,4 +4,4 @@
 # Date:   Thu Feb 6 11:30:48 2025 +0000
 #     Merge pull request #2655 from hvdijk/nativecpu-null-phevent
 #     [NativeCPU] Handle null phEvent.
-set(UNIFIED_RUNTIME_TAG 9d6542bac16db69d907002cb0f8c724c7a50d2dc)
+set(UNIFIED_RUNTIME_TAG "ewan/command-buffer_desc")