Rationale: `git` commands such as `git status` don't list these files
anymore which makes the output much more readable.

Move part related to broker request to common.

See merge request asapo/asapo!211

ci: use Python interpreter found by CMake when building sphinx doc

See merge request asapo/asapo!220

Rationale: using possibly different Python interpreters for the
different task can make the installation of packages required by the
different interpreters more complicated.

ci: run a single GitLab CI pipeline per commit

See merge request asapo/asapo!215

Commit to fix the current behavior of GitLab that triggers two CI
pipelines for the same commit.

For example, both the pipelines
[114510](https://gitlab.desy.de/asapo/asapo/-/pipelines/114510) and
[114511](https://gitlab.desy.de/asapo/asapo/-/pipelines/114511) ran on
the same commit 56d16797. See
asapo/asapo!214

Rename log field id to meta_id in case of get_metadata request. This field is string in contrast to message id, which is long.

Try to crate/get auto_id again in case of problem. This does happen when several receivers create new collection.