[UR] disable hwloc support for UMF

Hwloc package is not avalable on certain distros (e.g. RHEL).
To avoid forcing users to install hwloc from sources, disable
hwloc in UMF.

Author: igchor

sycl/cmake/modules/FetchUnifiedRuntime.cmake

@@ -23,6 +23,9 @@ option(SYCL_PI_UR_USE_FETCH_CONTENT
 set(SYCL_PI_UR_SOURCE_DIR
   "" CACHE PATH "Path to root of Unified Runtime repository")
 
+option(SYCL_UMF_DISABLE_HWLOC
+  "Disable hwloc support in UMF" ON)
+
 # Here we override the defaults to disable building tests from unified-runtime
 set(UR_BUILD_EXAMPLES OFF CACHE BOOL "Build example applications." FORCE)
 set(UR_BUILD_TESTS OFF CACHE BOOL "Build unit tests." FORCE)
@@ -112,23 +115,26 @@ if(SYCL_PI_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")
-  # commit b7b0c8b3d17aa7d511c67ec219d58091d07cfa60
-  # Merge: 2baf0951 5b8936da
+  set(UNIFIED_RUNTIME_REPO "https://github.com/igchor/unified-runtime.git")
+  # commit 2baf095188b235bb2b0a0140f0187d2041aef4b0
+  # Merge: 3d8fe8d2 58f85278
   # Author: Piotr Balcer <[email protected]>
-  # Date:   Fri Jul 26 15:48:04 2024 +0200
-  #     Merge pull request #1903 from kswiecicki/umf-version-bump
-  #     Bump UMF version again
-  set(UNIFIED_RUNTIME_TAG b7b0c8b3d17aa7d511c67ec219d58091d07cfa60)
+  # Date:   Fri Jul 26 12:06:22 2024 +0200
+  #     Merge pull request #1900 from kswiecicki/umf-version-bump
+  #     Bump UMF version
+  set(UNIFIED_RUNTIME_TAG 723c04544697b55f86ba25474faab516a7727d59)
 
   set(UMF_BUILD_EXAMPLES OFF CACHE INTERNAL "EXAMPLES")
   # Due to the use of dependentloadflag and no installer for UMF and hwloc we need
   # to link statically on windows
   if(WIN32)
     set(UMF_BUILD_SHARED_LIBRARY OFF CACHE INTERNAL "Build UMF shared library")
     set(UMF_LINK_HWLOC_STATICALLY ON CACHE INTERNAL "static HWLOC")
+  else()
+    set(UMF_DISABLE_HWLOC ${SYCL_UMF_DISABLE_HWLOC} CACHE INTERNAL "disable hwloc for UMF")
   endif()
 
+
   fetch_adapter_source(level_zero
     ${UNIFIED_RUNTIME_REPO}
     ${UNIFIED_RUNTIME_TAG}