Test was relying on qty_to_consume getting saved when the produce form
is saved, a behaviour of the SSF which diverged from the actual
client.
After fixing the SSF to behave more in-line with the actual
client (don't save o2m sub-fields unless they're flagged as
force_save) the test is now visibly broken.
Fix it so qty_done is properly updated during wizard configuration /
edition instead of updating the in-database object directly.
closesodoo/odoo#32047
Signed-off-by: Xavier Morel (xmo) <xmo@odoo.com>