Before this commit, when the `Milestones` feature is disable, the user
can always defined a service product with invoice policy equals to
'Based on Milestones' but since the feature is disabled he cannot add
this product on a milestone and so this configuratiom is useless without
the feature.
This commit removes the item into the invoice_policy field Selection
when the feature is disabled. Moreover, when the feature is disabled,
the existing products with this setting should be updated to be a
service product with `invoice_policy='delivered_manual'`. The quantity
delivered method of the existing SOLs containing those products should
also be updated to allow the user to manually edit the quantity
delivered of those SOLs when the `Milestones` feature is disabled.
However, when the `Milestones` feature is enabled again, only the
products contained in SOL linked to a milestone will be updated because
we cannot assume all service products with
`invoice_policy='delivered_manual'` were a service products with invoice
policy based on Milestones. Also the existing SOLs containing the
products updated will not be updated too to not impact the quantity
delivered.
task-2829542
Xavier BOL (xbo)
50ffc33999