Integrate config/update-gitlab-ci

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Commit: config@30b76b86

Integrate gitlab-ci/update-dual-espresso-path and 1 more

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@e6980d48

Update meta-seconorth-dual-espresso path

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@83002e07

accept_merge_request: explicitly check if MR has merge conflicts

According to the documentation [1] we should get a 406 error from the
API if we try to merge a merge request which has a merge conflict. We
are experiencing a different behaviour, though, where we are getting a
405 error in this case. There is an open GitLab issue on this topic [2].

In our error handling we assumed that the reason for a 405 error is most
likely a required pipeline which is still running. This assumtion,
however, leads to wrong behaviour in cases where no pipeline is started
at all.

Fixing this now by explicitly checking for merge conflicts at the very
beginning of the error handling sequence.

[1]: https://docs.gitlab.com/ee/api/merge_requests.html#merge-a-merge-request
[2]: https://gitlab.com/gitlab-org/gitlab/-/issues/364102

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Commit: config@9ff3366c

Integrate gitlab-ci/document-skip-build-label

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@0885629d

Document "skip build" label

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Commit: config@5479d7fc

Integrate gitlab-ci/skip-check-via-label and 1 more

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@5e514076

Add possibility to skip MR pipeline check via label

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@ee151673

Add possibility to skip MR pipeline build via label

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Commit: config@1648ea7d

Integrate gitlab-ci/allow-check-job-to-fail and 1 more

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@ad9d367e

Allow check job to fail

This makes merging a project MR possible even if the manifest has
received new commits since the MR pipeline build has run. The developer
is responsible for deciding whether it is safe to merge it without
having a build based on the latest manifest.

BCS 746-000794

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@81c2ad85

merge_into_manifest: fix error message if MR already exists