perf script: Show also errors for --insn-trace option

The trace could be misleading if trace errors are not taken into
account, so display them also by adding the itrace "e" option.

Note --call-trace and --call-ret-trace already add the itrace "e"
option.

Fixes: b585ebdb

 ("perf script: Add --insn-trace for instruction decoding")
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240315071334.3478-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>