List Orion server experiments in left menu

[notoraptor]

Hi @bouthilx ! This PR list available experiments in left menu.

• A wrapper function is added to make API calls.
• An API call is made to collect and then display available experiments.
• Tests are added for wrapper function and displayed experiments.
• An orion server is deployed when running Github Actions. It currently uses a version of Orion that accepts CORS requests. When related PR will be merged on Orion side, we could simply use Orion develop branch version.

Depends on: https://github.com/Epistimio/orion/pull/778

[notoraptor]

Hi @bouthilx ! This PR should be ready for a new review and merge. It works correctly with current version of orion.