Adds unit to the power port draw (#14208)

* adds unit to the power port draw #13587

* review changes #13587

* moved units to header #13587

* Abbreviate unit for consistency with e.g. PowerFeedTable available_power column

---------

Co-authored-by: Jeremy Stretch <jstretch@netboxlabs.com>

netbox/dcim/tables/devices.py

@@ -466,6 +466,12 @@ class PowerPortTable(ModularDeviceComponentTable, PathEndpointTable):
             'args': [Accessor('device_id')],
         }
     )
+    maximum_draw = tables.Column(
+        verbose_name=_('Maximum draw (W)')
+    )
+    allocated_draw = tables.Column(
+        verbose_name=_('Allocated draw (W)')
+    )
     tags = columns.TagColumn(
         url_name='dcim:powerport_list'
     )