[SYCL][Graph][L0] Reset L0 events for UR sync-points (#11553)

The [Unified Runtime
sync-points](https://oneapi-src.github.io/unified-runtime/core/EXP-COMMAND-BUFFER.html#sync-points)
used to represent SYCL-Graph edges have a bug in the implementation of
the Level Zero adapter. The L0 events used to implement the sync-points
are not reset to the non-signaled state after an enqueue of the graph.

Fixed in the UR L0 adapter change
oneapi-src/unified-runtime#965 which resets the
UR events to the non-signaled state at the end of the L0 command-list.

Author: EwanC

sycl/doc/design/CommandGraph.md

@@ -163,6 +163,9 @@ created on UR command-buffer enqueue.
 
 There is also a *WaitEvent* used by the `ur_exp_command_buffer_handle_t` class
 in the prefix to wait on any dependencies passed in the enqueue wait-list.
+This WaitEvent is reset at the end of the suffix, along with reset commands
+to reset the L0 events used to implement the UR sync-points back to the
+non-signaled state.
 
 ![L0 command-buffer diagram](images/L0_UR_command-buffer.svg)
 

sycl/doc/design/images/L0_UR_command-buffer.svg

@@ -54,13 +54,13 @@ if(SYCL_PI_UR_USE_FETCH_CONTENT)
   include(FetchContent)
 
   set(UNIFIED_RUNTIME_REPO "https://github.com/oneapi-src/unified-runtime.git")
-  # commit cf26de283a1233e6c93feb085acc10c566888b59
-  # Merge: 3a3aae38 2fd9dea2
+  # commit: 7c8617b3710736db642585fe310a64e19e059d2e
+  # Merge:  20d4f49  9a13af
   # Author: Kenneth Benzie (Benie) <[email protected]>
-  # Date:   Wed Oct 25 10:36:48 2023 +0100
-  #     Merge pull request #940 from Naghasan/victor/kernel-fusion-amd
-  #     [UR][HIP] Enable kernel finalization using comgr
-  set(UNIFIED_RUNTIME_TAG cf26de283a1233e6c93feb085acc10c566888b59)
+  # Date:   Thu Oct 26 10:20:03 2023 +0100
+  #         Merge pull request #965 from Bensuo/ewan/L0_internal_event_fix
+  #         [Command-buffer][L0] Reset sync-point events
+  set(UNIFIED_RUNTIME_TAG 7c8617b3710736db642585fe310a64e19e059d2e)
 
   if(SYCL_PI_UR_OVERRIDE_FETCH_CONTENT_REPO)
     set(UNIFIED_RUNTIME_REPO "${SYCL_PI_UR_OVERRIDE_FETCH_CONTENT_REPO}")