slapos_accounting: keep slapos_legacy_aggregated_subscription_trade_condition_2022 when uninstalling it

slapos_accounting: call OpenSaleOrder_reindexIfIndexedBeforeLine on an Open Order, instead of the Alarm

it is only used in one place. Let's create it manually

slapos_accounting: testSlapOSAccountingInteractionWorkflow: a project is required on the Instance Tree

(aka, no need for slapos_consumption_trade_condition)