perf annotate: Get rid of symbol__ensure_annotate()

perf annotate: Get rid of symbol__ensure_annotate()

Now symbol__annotate() is reentrant and it doesn't need to remove
non-instruction lines.  Let's get rid of symbol__ensure_annotate() and
call symbol__annotate() directly.  Also we can use it to get the arch
pointer instead of calling evsel__get_arch() directly.

Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240405211800.1412920-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>