apertis-pkg-merge-upstream-to-downstreams: Don't print useless information while canceling pipelines

Printing these values only creates noise in the log.

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

apertis-pkg-merge-upstream-to-downstreams: cancel pipelines created through the creation of a branch

Due to GitLab limitation (https://gitlab.com/gitlab-org/gitlab/-/issues/26422

),
it's currently impossible to avoid to trigger a pipeline when creating a
branch with the API. Since these useless pipelines are wasting
GitLab and OBS ressources (and devs' time), as a workaround for now
we can cancel them.

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

apertis-pkg-merge-upstream-to-downstreams: Add link to the bug report about missing skip_ci option in REST API

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

Only the pipeline in merge request context is relevant here.
"ci.skip" only affect branch pipelines and not merge request pipelines.
See https://docs.gitlab.com/ee/gitlab-basics/add-file.html#push-options-for-gitlab-cicd



Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

These tools come from:
https://gitlab.apertis.org/infrastructure/apertis-docker-images/-/tree/apertis/v2025dev3



Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>