pert tests: Update metric-value for perf stat JSON output

There may be multiplexing triggered, e.g., e-core of ADL.

Reviewed-by: Ian Rogers <[e-mail]>
Signed-off-by: Kan Liang <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Ahmad Yasin <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Stephane Eranian <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/tests/shell/lib/perf_json_output_lint.py

···
   for item in json.loads(input):
     if expected_items != -1:
       count = len(item)
-      if count != expected_items and count >= 1 and count <= 4 and 'metric-value' in item:
+      if count != expected_items and count >= 1 and count <= 6 and 'metric-value' in item:
         # Events that generate >1 metric may have isolated metric
-        # values and possibly other prefixes like interval, core and
-        # aggregate-number.
+        # values and possibly other prefixes like interval, core,
+        # aggregate-number, or event-runtime/pcnt-running from multiplexing.
         pass
       elif count != expected_items and count >= 1 and count <= 5 and 'metricgroup' in item:
         pass