PGLog: include rollback_info_trimmed_to in (read|write)_log

Fixes: #10157
Backport: firefly, giant
Signed-off-by: Samuel Just <sjust@redhat.com>
Merge pull request #3157 from athanatos/wip-10157

PGLog: include rollback_info_trimmed_to in (read|write)_log

Reviewed-by: Sage Weil <sage@redhat.com>