refactor: 💡 clean the chart variables
- ensure coherence in the names of the chart variables
- don't provide cached-assets to admin service (it does not use it)
- remove code related to cached assets in api service (it has moved to rows)

Note: I'm not sure we're allowed to put helper templates in subdirectories (_volumes/, etc). When deployed I'll try on staging, and move them back to the templates/ root directory if it failes.
refactor: 💡 clean the chart variables: - ensure coherence in the names of the chart variables
- don't provide cached-assets to admin service (it does not use it)
- remove code related to cached assets in api service (it has moved to rows)

Note: I'm not sure we're allowed to put helper templates in subdirectories (_volumes/, etc). When deployed I'll try on staging, and move them back to the templates/ root directory if it failes.