Integrate gitlab-ci/add-azure-stage

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@e6808701

Add "Deploy Azure" stage

This stage contains jobs to deploy packaged artifacts to our Azure blob
storage. The required variables `AZURE_STORAGE_ACCOUNT` and
`AZURE_STORAGE_SAS_TOKEN` are stored in the GitLab CI/CD variables.
The storage container `AZURE_CONTAINER_NAME` and artifact path
`AZURE_TARGET_FOLDER` are passed from the parent pipeline.