swh-search: use the consumer group used during the reindexation
swh-search: use the consumer group used during the reindexation

Related to T3433

SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site