vppapigen: crcchecker: report deprecated messages

Report if the messages were marked as deprecated,
but not yet deleted.

Useful for building the release notes and comparing
between the releases.

Also, put the dict_compare() call into the report(),
since latter always consumes the output of the former.

Change-Id: Iceab3e94ff66da931a4669b612026bd162dd5d1a
Type: improvement
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
(cherry picked from commit 62bd50de97cd90cc09559a09fe46f98211279a1e)