:recycle: Add mse home

[heavenboy8]

Reference : https://github.com/Cosmian/mse-backend/pull/35

Remaining stuffs:

• [x] Use mse-cli-core
• [x] Update intel-sgx-ra
• [x] Update mse docker args
• [x] Remove globale from conftest.py (same in mse_app_example)
• [x] Rewrite test_cli.py using parametrization and sequences as mse-home
• [x] Use the word "Cloud" in the documentation
• [ ] In doc: edit docker references