Integrate gitlab-ci/build-documentation-in-dedicated-job and 10 more

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@0a3b1406

Confluence: get only those build jobs with a corresponding successful deploy job

We cannot handle build jobs and deploy jobs similarly, because all build
jobs are successful usually, while not all deploy jobs necessarily have
run. Get build.env only from those build job which have a corresponding
successful deploy job, otherwise MACHINE and SUPPORTED_HARDWARE fields
always contain the full list of built platforms, even if they might have
not been deployed.

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@97228cdb

Move MACHINE variable from deploy.env to build.env

The Confluence stage is the only stage that needs the MACHINE variable.
Since the collect_release_information script already loads the build.env
from the build jobs, there is no need to store this variable in
deploy.env.

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@ba156b0f

Confluence: check if variables are defined

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@cae6e282

Confluence: improve variable passing to template

Use a general mechanism of storing all job variables for each build job
separately, so that we have all documentation files in the
FILES_documentation variable. This makes the dedicated HTML_FILES
variable obsolete.
The merged variables are still kept, though, so that we have all
machines in the MACHINE variable to loop over.

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@41f8a49f

Confluence: add error handling if artifact not found

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@1a519057

Make documentation files configurable

This disables the documentation jobs for SDK and FNGSystem.

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@303e24eb

Build documentation in dedicated job

Previously the documentation files were rendered as part of the package
jobs. Each package job converted the same set of static markdown files
to HTML files, which was redundant.

Add dedicated jobs to build, package and deploy the documentation files.

Modify convert_md2html.py to support file globs as arguments.

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@838da585

Refactoring: move Alphaplan stage code to the end

This reflects the stage order in the code.

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@ff31d083

Refactoring: use multiple MACHINE loops for better structure

This is a preparation for adding dedicated documentation jobs. In order
to have these grouped by stage along with their corresponding machine
jobs, we have to get rid of the giant outer loop and add loops for each
stage instead.

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@69973c95

Deploy: save deployed files in dotenv variable instead of dedicated file

Previously the deployed files were stored in a dedicated text file
called files.txt. Move this information to a dotenv variable called
FILES, so that we don't need special handling for it in the Confluence
stage.

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@45d04033

Remove disabling sourcery low-code-quality in package_release

This check is not failing anymore since the latest refactorings.