Before this commit, when we go to a Task. Click on the Tags field
> Search More. Group by Projects.
We get a list of projects groups. Click on them and they go from
(x) to (0) due to invalid group result from read_group without
valid domain same as search_read.
So in this commit, override the read_group method to pass the valid
domain same as search_read.
task-2959382
closesodoo/odoo#102236
X-original-commit: f9e9964c7138485ba328ce5cd4c4c8905c392adc
Signed-off-by: Xavier <xbo@odoo.com>