Grouping by many2many has been added with PR odoo/odoo#68958 (commit f4f570c3d6b403512d8523c74acd34d485f46af1) However the display names are not resolved resulting in the grouping displaying the actual id of the records. This also breaks some features such as `read_groups` which expect the group by data to contain a tuple (id, x) instead of just the id, this commit adds name resolving on many2many group bys. Task ID: 2398734 Part-of: odoo/odoo#74985