perf test shell record_bpf_filter: Skip 6.2 kernel

The BPF sample filtering requires two kernel changes below:

* bpf_cast_to_kernel_ctx() kfunc (added in v6.2)

* setting perf_sample_data->sample_flags (finished in v6.3)

The perf tools can check bpf_cast_to_kernel_ctx() easily so it can
refuse BPF filters on those old kernels (v6.1 and earlier).

But checking sample_flags appears to be difficult so current code won't
work on v6.2 kernel. That's unfortunate but I don't know what's the
correct way to handle it.

For now, let's skip v6.2 kernels explicitly (if failed) in the test.

Fixes: 9575ecdd198a50e9 ("perf test: Add perf record sample filtering test")
Reported-by: Arnaldo Carvalho de Melo <[e-mail]>
Signed-off-by: Namhyung Kim <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Ian Rogers <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: [e-mail]
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/tests/shell/record_bpf_filter.sh

···
   fi
   if perf script -i "${perfdata}" -F ip | grep 'ffffffff[0-9a-f]*'
   then
+    if uname -r | grep -q ^6.2
+    then
+      echo "Basic bpf-filter test [Skipped unsupported kernel]"
+      err=2
+      return
+    fi
     echo "Basic bpf-filter test [Failed invalid output]"
     err=1
     return