perf test: Update event group check for support of uncore event

The event group test checks group creation for combinations of hw, sw
and uncore PMU events. Some of the uncore pmus may require additional
permission to access the counters.

For example, in case of hv_24x7, partition need to have permissions to
access hv_24x7 pmu counters. If not, event_open will fail. Hence add a
sanity check to see if event_open succeeds before proceeding with the
test.

Fixes: 9d9b22bedad13d96 ("perf test: Add event group test for events in multiple PMUs")
Signed-off-by: Athira Jajeev <[email protected]>
Acked-by: Ravi Bangoria <[email protected]>
Cc: Disha Goel <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: [email protected]
Cc: Madhavan Srinivasan <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nageswara R Sastry <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Ravi Bangoria <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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