Since eb67feb5 we had to redo the hack to read fields from public user and set them in hr_employee.
However in this hack we used `_read`, which doesn't fill the cache with fields that are not stored,
which caused a cache miss when reading the field `avatar_128` from hr.employee, to display the image of
the manager in the kanban view of hr_appraisal.
This fix uses `read` instead.
closesodoo/odoo#96889
Signed-off-by: Vincent Schippefilt (vsc) <vsc@odoo.com>