Remove crc_1280_member permission from group

fixes https://gitlab.ruhr-uni-bochum.de/FDM/rdm-system/antleaf-projectmanagement/-/issues/406

hyrax/lib/tasks/crc_1280_group_delete_permission.rake

+namespace :rdms do
+  namespace :crc_1280_group do
+    task :delete_crc_member_permission, [:group_id] => :environment do |task, args|
+      group = Collection.find(args.group_id)
+      unless group.present?
+        abort("ERROR: Cannot find group #{args.group_id}")
+      end
+      if group.crc_collection_type != group
+        abort("ERROR: #{args.group_id} is not of type group")
+      end
+      puts "Deleting crc_1280_member permission for group #{args.group_id}"
+      permission_template = group.permission_template
+      access_grant = permission_template.access_grants.where(agent_id: "crc_1280_member").first
+      access_grant.destroy if access_grant.present?
+    end
+  end
+end