Reactivate the ack late configuration for the high priority tasks

It's needed to disable the prefeching of the tasks by the workers. It can lead in situations where a task is prefetched by a worker loading a big repo. The prefetch task will remain blocked until the big repo loading is done.

Related to T3857

Test Plan

diff origin/production/worker0.internal.staging.swh.network current/worker0.internal.staging.swh.network
*******************************************
  File[/etc/softwareheritage/loader_high_priority.yml] =>
   parameters =>
     content =>
      @@ -22,4 +22,5 @@
       max_content_size: 104857600
       celery:
      +  task_acks_late: true
         task_broker: amqp://swhconsumer:swh-deploy-worker-task_broker-password@scheduler0.internal.staging.swh.network:5672/%2f
         task_queues:
*******************************************
*** End octocatalog-diff on worker0.internal.staging.swh.network

---

Migrated from D6974 (view on Phabricator)

data/common/common.yaml

@@ -2385,6 +2385,7 @@ swh::deploy::worker::loader_high_priority::config:
   storage: "%{alias('swh::deploy::worker::storage::pipeline')}"
   max_content_size: "%{alias('swh::deploy::worker::loader::max_content_size')}"
   celery:
+    task_acks_late: true
     task_broker: "%{alias('swh::deploy::worker::task_broker')}"
     task_queues:
       # git