Add --print-only/-p option to krel announce
Add --print-only/-p option to krel announce

This allows us to retrieve the email contents for a tag without having
the need for sendgrid.

Signed-off-by: Sascha Grunert <70ab469ddb2ac3e35f32ed7c2fd1cca514b2e879@suse.com>

kubernetes/release,kubernetes/release