Update group in lib_sftp/tasks to `pusvc-g` #12508

Job	Run time
test (apache2)	14s
test (approvals)	17s
test (bibdata)	15s
test (bibdata_sqs_poller)	29s
test (bind9)	18s
test (blacklight_app)	14s
test (byzantine)	17s
test (cantaloupe)	14s
test (capistrano)	15s
test (common)	13s
test (composer)	14s
test (datadog)	18s
test (deploy_user)	14s
test (dpul)	12s
test (drupal10)	14s
test (drush)	27s
test (ealapps)	18s
test (extra_path)	17s
test (ezproxy)	18s
test (ffmpeg)	17s
test (figgy)	15s
test (figgy_filewatcher_worker)	20s
test (figgy_pubsub_worker)	17s
test (fits)	14s
test (freetds)	18s
test (geaccirc)	15s
test (gitlab)	14s
test (hr_share)	20s
test (imagemagick)	30s
test (kakadu)	18s
test (lae)	18s
test (lib_jobs)	15s
test (lib_svn)	15s
test (libwww)	19s
test (lockers_and_study_spaces)	22s
test (mailcatcher)	14s
test (mediainfo)	15s
test (memcached)	18s
test (mflux)	14s
test (mysql)	14s
test (nfsserver)	20s
test (nginx)	17s
test (nginxplus)	29s
test (nodejs)	14s
test (oawaiver)	14s
test (ojs)	18s
test (orangelight)	14s
test (passenger)	14s
test (php)	14s
test (postfix)	18s
test (postgresql)	28s
test (pul_nomad)	18s
test (pulmap)	14s
test (rails_app)	18s
test (redis)	15s
test (researchdata)	23s
test (ruby_s)	19s
test (samba)	12s
test (shared_data)	21s
test (sidekiq_worker)	14s
test (simple_annotation)	14s
test (sneakers_worker)	18s
test (special_collections)	14s
test (subversion)	18s
test (svn)	14s
test (timezone)	25s
test (tippecanoe)	14s
test (towerdeploy)	14s
test (ufw_firewall)	14s
test (video_reserves)	17s
test (vips)	14s
	20m 10s

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