Rename crm_lead_line `category_id` for `partner_category_id`

CHANGELOG:

### Fixed
- [#877](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/877) Rename crm_lead_line `category_id` for `partner_category_id`

Related card: https://trello.com/c/kVjidQTE/1408-error-creant-crmleadlines-manualment-per-la-ui

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