volume_group: Use cloud provider's default data disk

Thanks to recent commits, the volume_groups role can now use
{{ data_device }} for AWS just like it does for other cloud
providers.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Author: chucklever

playbooks/roles/volume_group/tasks/terraform/aws.yml

@@ -28,14 +28,14 @@
   register: terraform_output
   changed_when: false
 
-# FIXME: Stuff "/dev/sdf" into the data_device variable for AWS
 - name: Exclude the device that will house the /data file system
   vars:
     block_device_dict: "{{ terraform_output.stdout | from_json }}"
     local_map: "{{ block_device_dict[inventory_hostname] }}"
   ansible.builtin.set_fact:
     ebs_volume_ids: "{{ ebs_volume_ids + ['nvme-Amazon_Elastic_Block_Store_' + item.value | regex_replace('-', '')] }}"
-  when: item.key != "/dev/sdf"
+  when:
+    item.key != data_device
   with_dict: "{{ local_map }}"
 
 - name: Add unused EBS volumes to the volume list