perf tests: Skip 'perf stat metrics (shadow stat) test' for hybrid

Currently we don't support shadow stat for hybrid.

  root@ssp-pwrt-002:~# ./perf stat -e cycles,instructions -a -- sleep 1

   Performance counter stats for 'system wide':

      12,883,109,591      cpu_core/cycles/
       6,405,163,221      cpu_atom/cycles/
         555,553,778      cpu_core/instructions/
         841,158,734      cpu_atom/instructions/

         1.002644773 seconds time elapsed

Now there is no shadow stat 'insn per cycle' reported. We will support
it later and now just skip the 'perf stat metrics (shadow stat) test'.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210427070139.25256-26-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>