[FIX] project: portal should see projects only when he has tasks
[FIX] project: portal should see projects only when he has tasks

before this commit, on /my/tasks, in the filter dropdown, every project that had visibility = portal was displayed
regardless of whether the portal user was a follower or not

After this commit, we search project in a more clever manner

OPW 1878187
closes #26615

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo