[IMP] hr_timesheet: Improve the filters for 'My Timesheets' menu

Currently, Some filters of the 'My Timesheets' menu do not make
proper sense So purpose of this task is to remove those filters
from the 'My Timesheets' menu.

In this commit, we remove the following filters from the
'My Timesheets' menu:
  -Employee
  -Department
  -My Timesheets
  -My Team
Also, rename the 'My Project' filter into 'My Projects' and that
filter is inside the my timesheet menu so also filter the line for
current user.

closes odoo/odoo#48663

Taskid: 2224472
Related: https://github.com/odoo/enterprise/pull/9564


Related: odoo/enterprise#9564
Closes: 48663
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>