feat: add news discovery channels & maintaining the existings one

CHANGELOG:

### Changed
- [#1218](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/1218) Add new discovery channels

Related card: https://trello.com/c/YZ9bQn75/1899-modificacions-discovery-channel

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