At this time, the responsible for a time off type can be a user related
to another company. With this commit, this is no longer possible.
In order to do this (and to fix the existing bug that the domain on the
responsible_id field was overwritten by the domain specified on the
form view), the domain on the form view was moved to the responsible_id
field itself.
task-2981972
closesodoo/odoo#100381
Signed-off-by: Kevin Baptiste <kba@odoo.com>