Currently, we can only upload one file in a form File Upload field and
this file does not have a size limit. (Note that the server can have a
limit to prevent files too large from being uploaded but the file input
itself does not have one.)
This commit adds options to the form file inputs in order to set a
maximum number of files and the maximum file size (in MB) allowed to be
uploaded in these fields. The default values are 1 file and 1 MB. Note
that the option for the number of files is not displayed for the fields
where only one file is supposed to be uploaded.
If the uploaded files do not respect these limits, the form is not sent
and a message is displayed.
task-2798576
Part-of: odoo/odoo#89055
Soukéina Bojabza
f676463dbb