perf annotate: Pass hist_entry to annotate functions

It's a prepartion to support code annotation and data type
annotation at the same time.  Data type annotation needs more
information in the hist_entry so it needs to be passed deeper.

Also rename a function with the same name in the builtin-annotate.c
to hist_entry__stdio_annotate since it matches better to the command
line option.  And change the condition inside to be simpler.

Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250310224925.799005-5-namhyung@kernel.org


Signed-off-by: Namhyung Kim <namhyung@kernel.org>