[IMP] stock_release_channel_propagate_channel_picking: Propagate when assigning too

[rousseldenis]

As internal pickings could have generated a backorder and outgoing picking too without unrelease (e.g.: long term channels - no sleep), the channel is void on those internal backorders. So, at outgoing picking channel assignation, propagate the channel to the still existing origin pickings.

[OCA-git-bot]

This PR has the approved label and has been created more than 5 days ago. It should therefore be ready to merge by a maintainer (or a PSC member if the concerned addon has no declared maintainer). 🤖

[rousseldenis]

Can you drop changes to OCA generated files?

Will be hard. But that does not bother as these changes reflect also changes of the module.

[jbaudoux]

Can you drop changes to OCA generated files?

Will be hard. But that does not bother as these changes reflect also changes of the module.

@rousseldenis It's annoying when porting the commits to other version

[github-actions[bot]]

There hasn't been any activity on this pull request in the past 4 months, so it has been marked as stale and it will be closed automatically if no further activity occurs in the next 30 days. If you want this PR to never become stale, please ask a PSC member to apply the "no stale" label.