[CI][NFC] Clarify the breaking of the opportunistic_group (#19774)

This clarifies the break of sycl-rel 6.2 opportunistic_group test due to
the removal of the corresponding device aspect in
#19238 following the refactoring of
the experimental extension.

---------

Signed-off-by: Larsen, Steffen <steffen.larsen@intel.com>

Author: steffenlarsen

devops/compat_ci_exclude.sycl-rel-6_2

@@ -12,6 +12,12 @@ DiscardEvents/invalid_event_exceptions.cpp
 # Throw exception instead of returning garbage
 Basic/info.cpp
 
+# https://github.com/intel/llvm/pull/19238 removed the device aspect
+# corresponding to the opportunistic_group support, in favor of it being merged
+# into the fragment_group aspect. Since this was a full refactoring and renaming
+# of an experimental extension, we accept the breaking change.
+NonUniformGroups/opportunistic_group.cpp
+
 # https://github.com/intel/llvm/pull/17442 changed the behavior of
 # ext_oneapi_can_compile to refer to whether a source-based kernel_bundle can
 # be used with compile rather than build. This makes the OpenCL kernel compiler
@@ -39,9 +45,6 @@ KernelAndProgram/disable-caching.cpp
 # binaries built with sanitizers?
 Sanitizer
 
-# https://github.com/intel/llvm/pull/19238
-NonUniformGroups/opportunistic_group.cpp
-
 # https://github.com/intel/llvm/pull/17955, experimental extension
 AsyncAlloc/device/async_alloc_from_pool.cpp
 AsyncAlloc/device/async_alloc_zero_init.cpp