Integrate gitlab-ci/CI-fixes-for-merging and 5 more

Commit: https://gitlab.com/SECO-Northern-Europe/yocto/infrastructure/gitlab-ci/-/commit/ce59c40987d7a247d6e0eae713fc806237ace207

CI: deploy_gitlab_ci: Move one-time code to own function as reference

Initially the moved code was needed to create the files including the new implementation.

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Commit: https://gitlab.com/SECO-Northern-Europe/yocto/infrastructure/gitlab-ci/-/commit/b86fe23805678b5183fe3411dda3a42d697cbe38

CI: merge_into_manifest: Check if a commit is already merged

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Commit: https://gitlab.com/SECO-Northern-Europe/yocto/infrastructure/gitlab-ci/-/commit/daa4cbeed2fad173a436d3d5c484b43dbddaa25a

CI: Move the loop to check if a revision is related to another to common

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Commit: https://gitlab.com/SECO-Northern-Europe/yocto/infrastructure/gitlab-ci/-/commit/3e491ba0735c42e431609468a1b06a212e5905c4

CI: Add new file to query the revision for a project from the manifest.

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Commit: https://gitlab.com/SECO-Northern-Europe/yocto/infrastructure/gitlab-ci/-/commit/633e40df8078a6ffcb7b937ac0ecec66e78d485d

CI: Remove foobar projects from the yocto project list

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Commit: https://gitlab.com/SECO-Northern-Europe/yocto/infrastructure/gitlab-ci/-/commit/7ce0fd7430aa162965ea7fa411806b8379ebf220

CI: merge_gitlab_ci: Improve error handling.