currently, the upload button is removed in commit: https://github.com/odoo/odoo/commit/45f3659305359fff5b0c7bf3de7d49a25ba5c36d#diff-1db56050134b0962604e0407b7d23d39R41


But it should be displayed on list view.

So in this commit, show 'Upload' button on Expenses list view.

closes odoo/odoo#52341

Taskid: 2267580
Closes: #52341
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>