[FIX] hr_holidays: Allow Team leader to approve

Currently, a Team leader can't approve a leave of an employee
in his team if the leave type requires an allocation.

The reason is the `ir.rule` for `base.group_user` restricting allocation
read access to only your own allocation (`[('employee_id.user_id', '=', user.id)]`)
There are no `ir.rule` for group Team leader.
Therefore, a team leader can't read allocations for his team members.

Fix: add an `ir.rule` to allow a team leader to read allocations
of employees in his team.

+ add associated tests

0 files changed, 0 insertions, 0 deletions