Enable pinned dependency versions to enable dependabot updates (KANBAN-576)

[mluypaert]

PR intended for dependency management testing, with the goal to enable dependabot updates.
This PR only implements dependency management for the pipeline/seq_retrieval component as a test pilot.

[mluypaert]

Note for future reference:

• While poetry was considered as python dependency management tool (as it is already used in other python repositories accross the alliance), the current poetry version (1.*) turns out not to be PEP-621 compliant, which means it is not full compatible with dependabot (dependabot could update the poetry.lock file but not the depencies defined in non-PEP-621-compliant pyproject.toml configs that poetry uses, which means more manual interventions would be required to make dependabot-made updates work and persist).
• Poetry 2.* is promised to be PEP-621 compliant, but is unrelease at date with no promise on release date.
• As a consequence, the decision was made to use pip-compile (part of pip-tools) instead as dependency manager, as it is PEP-621 compliant and uses files and formats for version-locking which should be compatible with dependabot. Additionally, this also enables using standard tools like pip for package installation, as it locks all version in standard requirements.txt file formats.

Reference pages and tracking tickets:

• https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#package-ecosystem
• Support for updating Poetry pyproject.toml, not just poetry.lock? dependabot/dependabot-core#8603
• 2.0.0 Release python-poetry/poetry#9448