compute: Update 'server resize --revert', '--confirm' help

Update the help strings for these two arguments to indicate their
deprecated nature. This was previously flagged via a deprecation warning
but users would only see that if they were to run the command.

Change-Id: I31a5e27ac8bd2625a6073b54a51bf3e8d6126c8c
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>

Author: stephenfin

openstackclient/compute/v2/server.py

@@ -3769,12 +3769,20 @@ def get_parser(self, prog_name):
         phase_group.add_argument(
             '--confirm',
             action="store_true",
-            help=_('Confirm server resize is complete'),
+            help=_(
+                "**Deprecated** Confirm server resize is complete. "
+                "Replaced by the 'openstack server resize confirm' and "
+                "'openstack server migration confirm' commands"
+            ),
         )
         phase_group.add_argument(
             '--revert',
             action="store_true",
-            help=_('Restore server state before resize'),
+            help=_(
+                '**Deprecated** Restore server state before resize'
+                "Replaced by the 'openstack server resize revert' and "
+                "'openstack server migration revert' commands"
+            ),
         )
         parser.add_argument(
             '--wait',