Integrate the ci-tools templates

The EOLE/infra/ci-tools> .gitlab-ci.yml templates are ready for production:

• verify commitlint according to contributing guide
• automatic release with semantic-release
• build docker images
• execute on EOLE docker runners
• dev/testing/stable workflow rules

The current .gitlab-ci.yml define image and cache globally which is deprecated.

One option is to put them under default: keyword or use a hidden job as template.