[CI/CD] Improve config files using circle-ci orbs in order to re-use code

[6l20]

Summary / User Story

To improve re-usability / readability / maintainability of the existing commands, jobs, tasks, workloads found in the config.yaml we should introduce our own orbs

Pre-requisites

• Get acquainted withs orbs concepts and best practices
• Identify orbs and their responsibilities
• Create or re-use a dedicated orb repo

Technical Notes

https://circleci.com/orbs/?utm_source=google&utm_medium=sem&utm_campaign=sem-google-dg--emea-en-brandAuth-maxConv-auth-brand&utm_term=g_b-%2Bcircle%20%2Bci%20%2Borbs_c__condenseSU_20200730&utm_content=sem-google-dg--emea-en-brandAuth-maxConv-auth-brand_keyword-text_eta-circleCIOrbs_mixed-

Business Value

Will make less code duplication, improve readability, robustness and support of the CI/CD pipelines

Acceptance Criteria

• A more concise and readable config file.
• Zero impact on existing features and functionnalities
• Orbs with well separated responsibilities.
• Generic solution (parametrized orbs)
• Each orb is well documented