Integrate gitlab-ci/check-if-ci-enabled

Commit: seco-ne/yocto/infrastructure/gitlab-ci@c831d1da

get_integration_sources: check if CI is enabled

Trying to query CI variables on a project which does not have the CI feature enabled leads to an HTTP 403 (forbidden) error. Check whether CI is enabled using the "jobs_enabled" flag.

.gitlab-ci

-Subproject commit 5e3dfaeaf89701092780031ba72266ee27938996
+Subproject commit c831d1da915a4ac386554ff5ba2f73a8ff0d3da3