EICNET-2729: Add drush command to update organisation owners.

[lramarojaona]

Tests

• drush cr
• drush eic_groups:update-organisations-ownership
• drush cr
• drush sapi-r
• drush sapi-i
• Check that most of the organisations have now a new owner instead of "Community manager"

For search re-index, you don't need to wait till the end, luckily group entities are indexed in first place, so you just need to wait the first +/- 8000 items to be indexed.

Monitoring

You can run the following SQL query before and after to have an overview of oragnisations and owners:

SELECT gfd.label, ufd.name FROM group_content_field_data gcfd 
INNER JOIN group_content__group_roles gcgr ON gcfd.id = gcgr.entity_id
INNER JOIN groups_field_data gfd ON gfd.id = gcfd.gid
INNER JOIN users_field_data ufd ON gcfd.entity_id = ufd.uid
WHERE gcfd.type = 'organisation-group_membership'
AND gcgr.group_roles_target_id = 'organisation-owner';