volume: Add missing backup_id field in tests

This change also reverts commit:
  * 5f1ffe742c

Depends-On: https://review.opendev.org/c/openstack/openstacksdk/+/958801
Change-Id: Icac78179bc324e6fbe762f8095f2cba490ef6aea
Signed-off-by: Luan Utimura <luan.utimura@luizalabs.com>

openstackclient/tests/unit/volume/v3/test_volume.py

@@ -37,6 +37,7 @@ class TestVolumeCreate(volume_fakes.TestVolume):
     columns = (
         'attachments',
         'availability_zone',
+        'backup_id',
         'bootable',
         'cluster_name',
         'consistencygroup_id',
@@ -78,6 +79,7 @@ class TestVolumeCreate(volume_fakes.TestVolume):
         self.datalist = (
             self.volume.attachments,
             self.volume.availability_zone,
+            self.volume.backup_id,
             self.volume.is_bootable,
             self.volume.cluster_name,
             self.volume.consistency_group_id,
@@ -2011,6 +2013,7 @@ class TestVolumeShow(volume_fakes.TestVolume):
         self.columns = (
             'attachments',
             'availability_zone',
+            'backup_id',
             'bootable',
             'cluster_name',
             'consistencygroup_id',
@@ -2045,6 +2048,7 @@ class TestVolumeShow(volume_fakes.TestVolume):
         self.data = (
             self.volume.attachments,
             self.volume.availability_zone,
+            self.volume.backup_id,
             self.volume.is_bootable,
             self.volume.cluster_name,
             self.volume.consistency_group_id,

openstackclient/volume/v3/volume.py

@@ -107,8 +107,6 @@ def _format_volume(volume: _volume.Volume) -> dict[str, ty.Any]:
         'os-volume-replication:extended_status',
         # unnecessary columns
         'links',
-        # temporarily ignored columns
-        'backup_id',
     }
     optional_columns = {
         # only present if part of a consistency group