[FIX] *: hide technical field widgets in non-debug mode (Studio)

*:
- account
- barcodes
- calenndar
- hr_timesheet
- mail
- mass_mailing
- partner_autocomplete
- web
- website_slides

This commit removes description of fields that should not be shown in
non-debug mode Studio. Only field widgets whose own description is
set are displayed in non-debug mode Studio in "Widget" of sidebar.
In other words, even if any ancestor has a description but not the
current widget, it won't be displayed in the sidebar in non-debug
mode.

Task-Id 2056992

closes odoo/odoo#35902

Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>