fix: explicitly deprecate pip outdated

---

# Checks for dependencies that are not up to date.

# DEPRECATED

python:pip:outdated:

  stage: test

  image: ${CI_REGISTRY_IMAGE}:${CI_COMMIT_REF_NAME}

  variables:

    EXTRA_ARGS: ""

  script:

    - echo "[!] THIS JOB IS DEPRECATED AND NO LONGER MAINTAINED."

    - |

      OUTDATED="$(pip list --outdated --format freeze)"

      if [ ! -z "${OUTDATED}" ]; then