staging: Deploy opam lister

Related to T3438

Test Plan

octo-diff

Expectedly, this installs the new opam queue for staging lister worker only:

$ bin/octocatalog-diff --octocatalog-diff-args --no-truncate-details --to staging worker0.internal.staging.swh.network
...
Found host worker0.internal.staging.swh.network
*** Running octocatalog-diff on host worker0.internal.staging.swh.network
I, [2021-08-05T15:43:20.534427 #19620]  INFO -- : Catalogs compiled for worker0.internal.staging.swh.network
I, [2021-08-05T15:43:21.644416 #19620]  INFO -- : Diffs computed for worker0.internal.staging.swh.network
diff origin/production/worker0.internal.staging.swh.network current/worker0.internal.staging.swh.network
*******************************************
  File[/etc/softwareheritage/lister.yml] =>
   parameters =>
     content =>
      @@ -34,4 +34,5 @@
         - swh.lister.sourceforge.tasks.FullSourceForgeLister
         - swh.lister.sourceforge.tasks.IncrementalSourceForgeLister
      +  - swh.lister.opam.tasks.OpamListerTask
       credentials:
         github:
*******************************************
*** End octocatalog-diff on worker0.internal.staging.swh.network
$ bin/octocatalog-diff --octocatalog-diff-args --no-truncate-details --to staging worker01
...
*** Running octocatalog-diff on host worker01.softwareheritage.org
I, [2021-08-05T15:43:43.722017 #24533]  INFO -- : Catalogs compiled for worker01.softwareheritage.org
I, [2021-08-05T15:43:44.848790 #24533]  INFO -- : Diffs computed for worker01.softwareheritage.org
I, [2021-08-05T15:43:44.848834 #24533]  INFO -- : No differences
*** End octocatalog-diff on worker01.softwareheritage.org

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Migrated from D6061 (view on Phabricator)