[14.0][FIX] s_a_promise_release: Reset last_release_date on unrelease
When a transfer has been unreleased the last_release_date is not reset.
This breaks the counters and the list of records (To Release, To Do) on the related channel.
Now with this change the field name/label is incoherent...
cc @rousseldenis @lmignon
@TDu Can you fwd port to 16.0 ?
@TDu A little test should be welcome
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). 🤖
@TDu Could you rebase ?