Commit 0f98e2a4

 "gitlab-ci: Try to upload artifacts immediately" was
a bit too eager to skip capturing all OSTree bundles when in fact we
still need to capture the main update bundles to upload them to hawkBit.

Putting the hawkBit upload directly in the job building the bundles
would be a better option, but it seems too early since the hawkBit
upload has been restored only recently and it may still be flaky, so
a dedicated jobw with `allow_failure: true` still seems appropriate.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>